Horrid sailor, hot, by stream, topless (9)
I believe the answer is:
abhorrent
'horrid' is the definition.
(I've seen this before)
'sailor hot by stream topless' is the wordplay.
I cannot really understand how this works, but
'sailor' could be 'ab' (abbreviation for able seaman) and 'ab' is present in the answer.
'hot' could be 'h' (abbreviation eg on taps) and 'h' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for abhorrent that I've seen before include "Obscene" , "Hated" , "execrable" , "Horrible" , "Repulsive" .)