Persuaded to study a man back o' beyond (9)
I believe the answer is:
convinced
'persuaded' is the definition.
(convincing is a kind of persuading)
'study a man back o' beyond' is the wordplay.
I cannot quite see how this works, but
'study' could be 'con' (con can informally mean to study) and 'con' is present in the answer.
'man' could be 'vince' and 'vince' is found in the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for convinced that I've seen before include "Totally certain about something" , "Firmly persuaded" , "Quite sure" , "Absolutely certain" .)