Gran eager to find a hard-wearing fabric (7)
I believe the answer is:
nankeen
'a hard-wearing fabric' is the definition.
(nankeen is a type of fabric)
'gran eager' is the wordplay.
'gran' becomes 'nan' (I've seen this before).
'eager' becomes 'keen' (I've seen this before).
'nan'+'keen'='NANKEEN'
'to find' acts as a link.
(Other definitions for nankeen that I've seen before include "hard-wearing stuff" , "Chinese cotton cloth" , "Yellowish cotton cloth" , "Buff-coloured cotton cloth" , "Buff colour" .)