Across
Novice's knight trapped between king and queen (7)
Stop that man getting a ban (5,2)
Base supporting Democrat in county town (7)
Study abnormal tits, being a health professional (7)
17d
(and 17 Down) George Harrison's message of hope for constipation sufferers? (3,6,4,4)
Stop at nothing to get capital (5)
Golf shot by chap backing film producer (7)
Joined in dodgy dealing (7)
Over the phone markets basic rooms (5)
Onset of syphilis: in America it is something requiring treatment (9)
Golf shot by a politician revealing aid for driving (3,4)
Running and jumping in playground or around centre of Truro (7)
Ageless criminal's ability to avoid illness, in the main (3,4)
Second collection of books found with unusual stain (7)
Down
Shame Charlie is leaving; I am on foot (6)
Cancel round of drinks (4)
Poet's hideaway for consumption of non-alcoholic drinks? (6)
Former country house checked by royal aides, excitingly (8)
Models much of behaviour of horses when unconfined on sheep, primarily (10)
Finding unwanted signals nearly killed American from the south (8)
Secure position in part of yard with cradle (8)
State Austria supports 51 times (5)
Chinese director gets rid of formal greetings (10)
Top-up provided first for conscientious objector perhaps (8)
Spread rent out, which is rising, to afford cable (8)
See 12 Across
Briefly sleep on largely pleasant square sheet (6)
Uplifiting German war film not special? What a shame (3,3)
Walk ostentatiously in stone trough (5)
Support seen in interlude (4)
Type letters or click words in the clue