Exaggerate the six deliveries one has to make? (6)
I believe the answer is:
overdo
'exaggerate' is the definition.
('overdo' can be a synonym of 'exaggerate')
'the six deliveries one has to make?' is the wordplay.
'the six deliveries' becomes 'over' (cricket term).
'one has' says to put letters next to each other.
'to make?' becomes 'do' (doing is a kind of making).
'over'+'do'='OVERDO'
(Other definitions for overdo that I've seen before include "Use to excess" , "Be excessive in action or cooking" , "Be excessive, perhaps in cooking food" , "Exhaust" , "Use too much of (something)" .)