About one with guardian getting the prize (6)
I believe the answer is:
reward
'the prize' is the definition.
(a prize may be given as a reward)
'about one with guardian' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'one with guardian' becomes 'ward' (I can't justify this - if you can you should give a lot more credence to this answer).
're'+'ward'='REWARD'
'getting' is the link.
Can you help me to learn more?
(Other definitions for reward that I've seen before include "'Virtue is its own . . . . . .'" , "Payment for services rendered" , "Pay" , "payment that's merited" , "Money offered for info" .)