A dishy worker, and that's not all (8)
I believe the answer is:
handsome
'a dishy' is the definition.
I can't judge whether this definition defines the answer.
'worker and that's not all' is the wordplay.
'worker' becomes 'hand' (hand is a kind of worker).
'and' says to put letters next to each other.
'that's not all' becomes 'some' ('some' is the opposite to 'all').
'hand'+'some'='HANDSOME'
Can you help me to learn more?
(Other definitions for handsome that I've seen before include "Easy on the eye" , "Nomads he found to be good-looking" , "Good-looking or generous" , "large" , "Fine-looking" .)