Study year all set to go (5)
I believe the answer is:
ready
'all set to go' is the definition.
(I've seen this before)
'study year' is the wordplay.
'study' becomes 'read' (synonyms).
'year' becomes 'y'.
'read'+'y'='READY'
(Other definitions for ready that I've seen before include "Waiting" , "bread" , "Quick" , "Fully-prepared" , "Prepare < dough" .)