Though soft in caress, perhaps, is abrasive (7)
I believe the answer is:
scrapes
'is abrasive' is the definition.
I can't judge whether this definition defines the answer.
'though soft in caress' is the wordplay.
I cannot really understand how this works, but
'soft' could be 'p' (musical abbreviation for 'piano', soft) and 'p' is located in the answer.
an anagram of 'caress' is 'scraes' which is located in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for scrapes that I've seen before include "Predicaments" , "Jars" .)