Spot right idiot in wrinkly fabric (10)
I believe the answer is:
seersucker
'wrinkly fabric' is the definition.
(seersucker is a type of wrinkled fabric)
'spot right idiot' is the wordplay.
'spot' becomes 'see' (I've seen this in another clue).
'right' becomes 'r' (common abbreviation).
'idiot' becomes 'sucker' (sucker can mean a foolish or gullible person).
'see'+'r'+'sucker'='SEERSUCKER'
'in' is the link.
(Other definitions for seersucker that I've seen before include "Cotton" , "Puckered fabric" , "Material" .)