Over six deliveries? (5)
I believe the answer is:
balls
'deliveries?' is the definition.
(ball is a kind of delivery)
'over six' is the wordplay.
I cannot really see how this works, but
'over' could be 'all' (synonyms) and 'all' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for balls that I've seen before include "See 7" , "nonsense" , "Spheres, globes" , "Formal dances" , "Rubbish" .)