Try a story, number one (6)
I believe the answer is:
goalie
'number one' is the definition.
(I've seen this before)
'try a story' is the wordplay.
'try' becomes 'go' (both can mean an attempt).
'story' becomes 'lie' (story can mean a fabrication).
'go'+'a'+'lie'='GOALIE'
(Other definitions for goalie that I've seen before include "Hart perhaps" , "Football team member" , "number one" , "Soccer player who protects the target" , "On-field custodian" .)