Surplus Sun deliveries (5)
I believe the answer is:
overs
'deliveries' is the definition.
(cricket term)
'surplus sun' is the wordplay.
'surplus' becomes 'over' (I've seen this before).
'sun' becomes 's'.
'over'+'s'='OVERS'
(Other definitions for overs that I've seen before include "they may be limited internationally" , "Bowling spells" , "Rounds of six bowls in cricket" , "Maidens perhaps" , "Series of balls in cricket" .)