Rally in park finished (7)
I believe the answer is:
recover
'rally' is the definition.
(rally can mean to recover from illness)
'park finished' is the wordplay.
'park' becomes 'rec' (short for recreation ground).
'finished' becomes 'over' (over can mean finished or ended).
'rec'+'over'='RECOVER'
'in' acts as a link.
(Other definitions for recover that I've seen before include "Regain" , "Get better - get back" , "get fit again" , "Bring back" , "Recuperate" .)