HEADMISTRESS - Confused master hissed school principal (12) Confused indicates an ANAGRAM of of 'MASTERHISSED'
ARSON - Crime at religious house with page missing (5) a 'PARSONAGE' is a religious house, take 'PA GE' away leaves 'arson' a crime.
CUSTODY - Almost swear currently without a confinement (7) most of the word 'CUSS' meaning swear added to 'TODAY' which adds up to being in confinement
BREEZEBLOCKS - Building materials a little wind impedes (12) a little wind is a 'breeze' and impede is another word for 'blocks'
BEAVER - A brave mixed-up aquatic rodent (5) mixed-up indicates an ANAGRAM of 'A BRAVE'
FENCER - Sportsperson making a boundary (6) someone who plays a sport and also puts up a boundary which might be a fence
LONGTROUSERS - Garment, lounger's sort possibly (5,8) ANAGRAM of 'loungerssort'
SINCERE - Resin plastered round the church, honest (7) the church is CE - Church of England, plastered hints at an ANAGRAM of 'SIN..RE' around
NOISE - One stuck in organ making a racket (5) the organ is your nose and making a 'racket' means making a 'noise'
STATIONWAGON - Terminal tail movement on American automobile (7,5) a 'STATION' is a terminal, tail movement is 'WAG' and the word 'ON' is added
HEAL - Mend a wound in the altercation (4) word hidden in 'tHE ALtercation'
AUSTRIA - European country when Al's away from Southern Continent (7) 'AUSTRALIA' take away 'AL' from middle
MANSE - House in seaman's estate? (5) hidden word in 'seaMAN'S Estate'
SOCCER - Roughly score about 100 in game (6) 'Roughly' hints at ANAGRAM of 'SCORE' with added Roman number for 100 which is 'C'
RESOLVE - Determination to do the puzzle again (7) double meaning of the word 'RESOLVE'
STOIC - Bravely suffering within turns to ice (5) 'within' is clue there is a hidden word in 'turnS TO ICe'
EYESORE - Stye is a horrible sight (7) a stye is a sore on your eyelid
OBELISK - Stone pillar is grabbed by drunken bloke (6) the word 'IS' is mixed with 'DRUNKEN'
ENTREAT - Beg for change in net rate (6) ANAGRAM of 'NET RATE'
CARVING - Five in supportive environment produces sculpture (7) 'CARING' plus Roman symbol for five 'V'
COMETO - Celestial body with tail, ring to wake up (6) 'COMET' plus 'O'
NONET - Nobody on short time for musical work (5) 'NONE plus 'T' - an octet is music for 8 players, a nonet for 9
SINEW - Wines blended for strength (5) blended hints at an ANAGRAM of 'WINES'
KEEN - Eager that Scots know about Orient (4) the Scots say 'ye ken' meaning 'you know' and the Orient is the Far East so add 'E'
