Material found possibly only at the north (5)
I believe the answer is:
nylon
'material' is the definition.
(I know that nylon is a type of material)
'possibly only at the north' is the wordplay.
'possibly' is an anagram indicator.
'at' says to put letters next to each other.
'the north' becomes 'N' (abbreviation).
'only' anagrammed gives 'nylo'.
'nylo'+'n'='NYLON'
'found' is the link.
(Other definitions for nylon that I've seen before include "Tights material" , "Cover for leg" , "Type of material" , "Plastic used for stockings" , "Fibre of polymeric amides" .)