Organ afterwards made of clay (7)
I believe the answer is:
earthen
'made of clay' is the definition.
(I've seen this in another clue)
'organ afterwards' is the wordplay.
'organ' becomes 'ear' (the ear is an organ).
'afterwards' becomes 'then' (I've seen this in other clues).
'ear'+'then'='EARTHEN'
(Other definitions for earthen that I've seen before include "from the ground" , "Made of baked or fired clay" , "(Of pot) made of baked clay" , "of the soil" , "that's thrown in clay" .)