Provide what's needed to achieve a great result (7,3,5)
I believe the answer is:
deliver the goods
'provide what's needed' is the definition.
I know nothing about this answer so I can't tell whether this works.
'a great result' is the wordplay.
I cannot quite understand how this works, but
'great' could be 'good' (similar in meaning) and 'good' is found within the answer.
This explanation may well be incorrect...
'to achieve' is the link.
Can you help me to learn more?
(Other definitions for deliver the goods that I've seen before include "It could be the lorry driver's job to do this" , "Carry out what is required" .)