Fabric of short double lines (5)
I believe the answer is:
twill
'fabric' is the definition.
(twill is a kind of fabric)
'short double lines' is the wordplay.
'short' means to remove the last letter.
'double' becomes 'twin' (I've seen this before).
'lines' becomes 'll' (I've seen this in other clues).
'twin' with its last letter removed is 'twi'.
'twi'+'ll'='TWILL'
'of' acts as a link.
(Other definitions for twill that I've seen before include "Stuff" , "Ribbed cloth" , "Strong ridged fabric" , "Fabric woven to produce a surface of diagonal parallel ridges" , "Diagonal-weave fabric" .)