A cold remark about Phils dubious talent (14)
I believe the answer is:
accomplishment
'talent' is the definition.
(thesaurus)
'a cold remark about phils dubious' is the wordplay.
'cold' becomes 'c' (eg on taps).
'remark' becomes 'comment' (synonyms).
'about' indicates putting letters inside.
'dubious' indicates an anagram.
'phils' with letters rearranged gives 'plish'.
'comment' enclosing 'plish' is 'complishment'.
'a'+'c'+'complishment'='ACCOMPLISHMENT'
(Other definitions for accomplishment that I've seen before include "exploit" , "Skill" , "Successful achievement" , "Something achieved" .)