Ready to explode? Nap in part of chair (7)
I believe the answer is:
armrest
'part of chair' is the definition.
(I've seen this before)
'ready to explode? nap' is the wordplay.
I cannot really understand how this works, but
'nap' could be 'rest' and 'rest' is found within the answer.
The remaining letters 'arm' is a valid word 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 armrest that I've seen before include "Part of a chair - smarter (anag)" , "Part of sofa or chair" , "sort of support is needed" , "giving a member support" , "Padded side to a chair" .)