Crossword Genius

Do everything possible with lovely guitar I damaged (4,2,4,3)

Ross

I believe the answer is:

give it your all

I'm a little stuck... Click here to teach me more about this clue!

'possible with lovely guitar i damaged' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'do everything' is the wordplay.
I cannot really see how this works, but
'everything' could be 'all' (all things) and 'all' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Irish Times.
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