Disapprove strongly of absurd old peer (7)
I believe the answer is:
deplore
'disapprove strongly' is the definition.
(I've seen this before)
'absurd old peer' is the wordplay.
'absurd' indicates anagramming the letters.
'old'+'peer'='oldpeer'
'oldpeer' is an anagram of 'DEPLORE'.
'of' is the link.
(Other definitions for deplore that I've seen before include "Regret deeply and strongly disapprove" , "Bemoan" , "Sorrow over" , "Condemn" , "Lament" .)