Paunch good for Merkel (3)
I believe the answer is:
gut
'paunch' is the definition.
(I've seen this before)
'good for merkel' is the wordplay.
'good' becomes 'g' (abbreviation).
'for' means one lot of letters go next to another.
'merkel' becomes 'ut' (I can't explain this - if you can you should give a lot more credence to this answer).
'g'+'ut'='GUT'
Can you help me to learn more?
(Other definitions for gut that I've seen before include "Paunch" , "Entrails" , "Remove the insides, of a fish say" , "Evidence of heavy drinking" , "Part of the alimentary canal" .)