Sound asleep I am in soft leather! (5)
I believe the answer is:
nappa
'sound asleep i am in soft leather' is the definition.
'nappa' can be an answer for 'leather' (I've seen this before). I am not sure about the 'sound asleep i am in soft' bit.
'am in soft leather' is the wordplay.
'am' becomes 'p' (I can't explain this - if you can you should believe this answer much more).
'in' means one lot of letters goes inside another.
'soft leather' becomes 'napa' (I've seen this in another clue).
'p' going inside 'napa' is 'NAPPA'.
Can you help me to learn more?
(Other definitions for nappa that I've seen before include "Sort of kid, perhaps" , "leather" .)