Stage about right for remark (6)
I believe the answer is:
phrase
'remark' is the definition.
(thesaurus)
'stage about right' is the wordplay.
'stage' becomes 'phase' (both can mean a part or period of something).
'about' means one lot of letters goes inside another.
'right' becomes 'r' (common abbreviation).
'phase' placed around 'r' is 'PHRASE'.
'for' is the link.
(Other definitions for phrase that I've seen before include "Group of words without a verb" , "few words from a tourist guide?" , "Has rep part of a sentence?" , "Sequence of words" , "Short musical passage" .)