Only order northern fabric (5)
I believe the answer is:
nylon
'fabric' is the definition.
(nylon is a kind of fabric)
'only order northern' is the wordplay.
'order' indicates anagramming the letters.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'only' is an anagram of 'nylo'.
'nylo'+'n'='NYLON'
(Other definitions for nylon that I've seen before include "Synthetic fabric invented in 1938" , "The first synthetic fibre" , "Artificial material" , "Synthetic cloth" , "Yarn for stockings" .)