Continually egg the girl and fellow to (2,3,2)
I believe the answer is:
on and on
'continually' is the definition.
(I've seen this before)
'egg the girl and fellow to' is the wordplay.
I cannot quite see how this works, but
'egg' could be 'o' (an 'o' resembles an egg) and 'o' is found in the answer.
'girl' could be 'nan' (short for Nancy or Ann) and 'nan' is located in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
The remaining letters 'do' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for on and on that I've seen before include "Continuing or continually" , "continuously" , "Endlessly" , "At tedious length" , "Ever" .)