Eric and Mac make pottery (7)
I believe the answer is:
ceramic
'pottery' is the definition.
(I've seen this before)
'eric and mac make' is the wordplay.
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
'make' is an anagram indicator.
'eric' after 'mac' is 'maceric'.
'maceric' anagrammed gives 'CERAMIC'.
(Other definitions for ceramic that I've seen before include "Brittle material of baked clay" , "Like pottery" , "Earthenware" , "Potter's product" , "Relating to pottery" .)