For me, perhaps, it’s a preface (5)
I believe the answer is:
proem
'a preface' is the definition.
(thesaurus)
'for me perhaps' is the wordplay.
'for' becomes 'pro' (I've seen this before).
'perhaps' indicates an anagram.
'me' is an anagram of 'em'.
'pro'+'em'='PROEM'
'it's' acts as a link.
(Other definitions for proem that I've seen before include "Preliminary part" , "introductory piece" , "Prelude" , "introduction" .)