Sprint in gym class, then have fruit (5)
I believe the answer is:
prune
'have fruit' is the definition.
'prune' can be an answer for 'fruit' (prune is a kind of fruit). I am not sure about the 'have' bit.
'sprint in gym class' is the wordplay.
'sprint' becomes 'run' (I've seen this before).
'in' is an insertion indicator.
'gym class' becomes 'pe' (abbreviation for physical education).
'run' put into 'pe' is 'PRUNE'.
'then' is the link.
Can you help me to learn more?
(Other definitions for prune that I've seen before include "Trim (tree); dried plum" , "Dull person" , "Trim - dried fruit" , "Shrivelled fruit" , "A fruit; to cut back" .)