Rough characters cutting cocaine for piano lounge (6)

I believe the answer is:
sprawl
'lounge' is the definition.
(I've seen this before)
'rough characters cutting cocaine for piano' is the wordplay.
I cannot quite see how this works, but
'cutting' could be 'raw' (synonyms) and 'raw' is found within the answer.
'piano' could be 'p' (musical abbreviation) and 'p' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sprawl that I've seen before include "Sit lazily, with limbs spread wide" , "Lie in an ungainly fashion" , "Loll, stretch out" , "What stragglers do" , "Urban or industrial expansion" .)
