Hot goal in rugby score (6)
I believe the answer is:
trendy
'hot' is the definition.
(I've seen this before)
'goal in rugby score' is the wordplay.
'goal' becomes 'end' (both can mean a purpose).
'in' means one lot of letters goes inside another.
'rugby score' becomes 'try' (I've seen this before).
'end' going within 'try' is 'TRENDY'.
(Other definitions for trendy that I've seen before include "Informally, following the fashions" , "With it, a la mode" , "Less sensible; a dye plant" , "Fashionable, in style" , "In fashion, of popular style" .)