18a On one date cleavage proves to be purposeless! (6) ?d?i?g
It has to be IDLING but what does LING (type of fish or type of heather) have to do with cleavage?
11a Filthy topless miss (4) L?c?
LACK being Black minus first letter?
19d Gut reaction:drink good for pulling (7)
??g?ing gave me GAGGING which supplies the G as final letter of 18a. Is this wrong? If ADRIFT is correct then I can see TUGGING