Help pair out with adhesive for operation (3,11)
I believe the answer is:
hip replacement
'operation' is the definition.
(type of surgical operation)
'help pair out with adhesive' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'with' is a charade indicator (letters next to each other).
'adhesive' becomes 'cement' (cement is a kind of adhesive).
'help'+'pair'='helppair'
'helppair' is an anagram of 'hiprepla'.
'hiprepla'+'cement'='HIP-REPLACEMENT'
'for' is the link.
(Other definitions for hip replacement that I've seen before include "Inserted joint" , "Joint operation" .)