Knowledgeable solicitor, say, on a roll finally with a great score in golf (5,5)
I believe the answer is:
legal eagle
'knowledgeable solicitor say on a roll finally with a great' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'score in golf' is the wordplay.
I cannot really understand how this works, but
'score' could be 'eagle' (eagling is a kind of scoring) and 'eagle' is found within the answer.
'golf' could be 'g' (phonetic alphabet: alpha, bravo, charlie etc.) and 'g' is present in the answer.
The remaining letters 'leal' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for legal eagle that I've seen before include "Bright lawyer (colloq.)" , "Astute lawyer" , "Brief" , "perhaps the best defence" .)