Reserve has time to get out of condition before sport days (5,4)
I believe the answer is:
trust fund
'reserve' is the definition.
(a reserve of funds)
'time to get out of condition before sport days' is the wordplay.
'time' becomes 't' (abbreviation).
'to get out of condition' becomes 'rust' (to get rusty is to get out of condition).
'before' is a charade indicator (letters next to each other).
'sport' becomes 'fun' (synonyms).
'days' becomes 'd' (abbreviation for days).
't'+'rust'+'fun'+'d'='TRUST FUND'
'has' is the link.
(Other definitions for trust fund that I've seen before include "Assets held for the good of beneficiaries" , "Reserved money" , "In which money may be held" , "This money's set aside" .)