Sleep in small wood (7)
I believe the answer is:
slumber
'sleep' is the definition.
(I know that sleep can be written as slumber)
'in small wood' is the wordplay.
'in small' becomes 's' (abbreviation - e.g. clothes size. I am not sure about the 'in' bit.).
'wood' becomes 'lumber' (I've seen this before).
's'+'lumber'='SLUMBER'
Can you help me to learn more?
(Other definitions for slumber that I've seen before include "Drop off" , "Doze" , "nap" , "Rumbles (anag.)" , "repose" .)