We supply cards doddery elders will receive 1st of April (7)
I believe the answer is:
dealers
'we supply cards' is the definition.
I can't judge whether this definition defines the answer.
'doddery elders will receive 1st of april' is the wordplay.
'doddery' indicates anagramming the letters.
'will receive' means one lot of letters goes inside another.
'1st of april' becomes 'A' (1st letter of 'april').
'elders' anagrammed gives 'delers'.
'delers' placed around 'a' is 'DEALERS'.
Can you help me to learn more?
(Other definitions for dealers that I've seen before include "handing out cards" , "Traders -- leaders (anag)" , "Traders in goods and currencies" , "Merchants" .)