Build up for goal in free flowing soccer (9)
I believe the answer is:
crescendo
'build up' is the definition.
(thesaurus)
'goal in free flowing soccer' is the wordplay.
'goal' becomes 'end' (both can mean a purpose).
'in' indicates putting letters inside.
'free flowing' indicates anagramming the letters (letters flow around).
'soccer' anagrammed gives 'cresco'.
'end' put into 'cresco' is 'CRESCENDO'.
'for' acts as a link.
(Other definitions for crescendo that I've seen before include "rising from piano?" , "High point" , "Gradual increase in loudness, musically" , "Conceders (anag.)" , "Gradually increasing in volume" .)