Canine coat not adapted for chain (13)
I believe the answer is:
concatenation
'chain' is the definition.
(synonyms)
'canine coat not adapted' is the wordplay.
'adapted' is an anagram indicator.
'canine'+'coat'+'not'='caninecoatnot'
'caninecoatnot' with letters rearranged gives 'CONCATENATION'.
'for' acts as a link.
(Other definitions for concatenation that I've seen before include "one thing after the other" , "chain" .)