Belt is damaged in parts (5)
I believe the answer is:
strap
'belt' is the definition.
(I've seen this before)
'damaged in parts' is the wordplay.
'parts' can be anagrammed to 'STRAP'.
However, I am not clear how this is indicated.
'is' is the link.
Can you help me to learn more?
(Other definitions for strap that I've seen before include "Shoulder band" , "Fasten; punishment" , "Narrow strip of leather" , "Restraining fastener" , "loopy band" .)