Fashionable Rugby score is about to finish (6)
I believe the answer is:
trendy
'fashionable' is the definition.
(similar in meaning)
'rugby score is about to finish' is the wordplay.
'rugby score' becomes 'try' (I've seen this in another clue).
'is about' is an insertion indicator.
'to finish' becomes 'end' ('end' can be a synonym of 'finish').
'try' placed around 'end' is 'TRENDY'.
(Other definitions for trendy that I've seen before include "Modish" , "following fashion" , "Informally fashionable" , "Less sensible; a dye plant" , "Up-to-date with the latest fad" .)