Sleep in something soft and fluffy (3)
I believe the answer is:
nap
'sleep' is the definition.
(a nap is a short sleep)
'something soft and fluffy' is the wordplay.
I cannot really see how this works, but
'soft' could be 'p' (musical abbreviation for 'piano') and 'p' is present in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
A single letter 'a' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for nap that I've seen before include "A brief informal sleep" , "A brief snooze" , "Quick sleep; raised pile" , "Little sleep" , "Short sleep on soft surface texture?" .)