Spinner sees heroic exploit cut short in front of bird (6)
I believe the answer is:
deejay
'spinner' is the definition.
(a DJ might spin records)
'heroic exploit cut short in front of bird' is the wordplay.
'heroic exploit' becomes 'deed' (I've seen this before).
'cut short' means to remove the last letter.
'in front of' says to put letters next to each other.
'bird' becomes 'jay' (jay is a kind of bird**).
'deed' with its final letter taken off is 'dee'.
'dee'+'jay'='DEEJAY'
'sees' acts as a link.
(Other definitions for deejay that I've seen before include "Disc-jockey" , "Record presenter" , "player of many tunes" , "Modern spelling of disc jockey" , "Disc jockey (colloq.)" .)