Prunes have to manage (3)
I believe the answer is:
run
'manage' is the definition.
(both can mean to organise)
'prunes have' is the wordplay.
'have' indicates a hidden word.
'RUN' is hidden within 'prunes'.
'to' acts as a link.
(Other definitions for run that I've seen before include "Enter a race" , "Unit of score in cricket" , "Move fast or manage" , "faster pace needed" , "Uninterrupted sequence" .)