Dined on roast on Sunday with representatives (7)
I believe the answer is:
legates
'representatives' is the definition.
(legate is a kind of representative)
'dined on roast on sunday' is the wordplay.
I cannot quite see how this works, but
'dined' could be 'ate' (I've seen this in another clue) and 'ate' is located in the answer.
'on' could be 'leg' (cricket term, fielding positions) and 'leg' is found in the answer.
'sunday' could be 's' and 's' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'with' acts as a link.
Can you help me to learn more?
(Other definitions for legates that I've seen before include "representatives" , "Pope's envoys" .)