Good-looking cards dealt thus, by me (8)
I believe the answer is:
handsome
'good-looking' is the definition.
('handsome' can be a synonym of 'good-looking')
'cards dealt thus by me' is the wordplay.
'cards' becomes 'hand' (I've seen this in other clues).
'dealt thus' becomes 'so' (I can't explain this - if you can you should believe this answer much more).
'by' is a charade indicator (letters next to each other).
'hand'+'so'+'me'='HANDSOME'
Can you help me to learn more?
(Other definitions for handsome that I've seen before include "Fine-looking" , "Good-looking or generous" , "Good-looking, as a male say" , "Well-proportioned" , "Striking" .)