Material found in corner, as in order... (8)
I believe the answer is:
nainsook
'material' is the definition.
(nainsook is a kind of material)
'in corner as in order' is the wordplay.
'in' means one lot of letters goes inside another.
'corner' becomes 'nook' (synonyms).
'order' indicates an anagram.
'as'+'in'='asin'
'asin' with letters rearranged gives 'ains'.
'nook' placed around 'ains' is 'NAINSOOK'.
'found' is the link.
(Other definitions for nainsook that I've seen before include "Fine soft cotton fabric" , "Material" , "Corner location houses first class new section on cotton fabric" .)