Across
Make facts, time and time again, the heart of science (8)
Sleuth in a deli regularly knocked back drink (3,3)
Observer disheartened by hack returning to pass on material (8)
Undermine writer's mate (6)
Part of paint roller that's beginning to work (5)
Hercule Poirot originally confused after opening of shallow grave (9)
Pretty carriage seen in race (6)
Feature filled with anger regularly reveals annoyance (7)
Excuses arising from training in kinky sex with me (7)
Current filling subsequently rejected for sale (6)
Flower's bottom part raised, by the sound of it (9)
Small birds get cold feet (5)
Slowly notice a soldier has nothing on (6)
Boxer dog I put up for sale (8)
Fine composer docked next to big city (6)
Famous study acquired by the Queen is sent back (8)
Down
Coming out with economy of language (6)
Thing jumping ahead of horse trial (9)
Republican Party keeps working to make musical composition (5)
In need of a drink? This malt whisky, in conclusion, is about right (7)
Yielding excellent reversal in illness (9)
When starting to request another song, he'll refuse (5)
One enthralled by a simple finale of song in concert (8)
Impressive digital photograph? (4)
Glut of information, the source of which agent revealed externally (9)
Helping to suppress unions oddly creates havoc (9)
Bassline composed for gay women (8)
Order instant tea to begin with (4)
Joy has first of uncles for a break (7)
Torn to pieces, as a roof may be (6)
Bang on about small breakfast item (5)
Leave zero capital (5)
Type letters or click words in the clue