The woman set off to get bed linen (6)
I believe the answer is:
sheets
'bed linen' is the definition.
(I've seen this in another clue)
'the woman set off to get' is the wordplay.
'the woman' becomes 'she' ('she' refers to a woman).
'off' is an anagram indicator.
'to get' is an insertion indicator.
'set' is an anagram of 'ets'.
'she' going inside 'ets' is 'SHEETS'.
(Other definitions for sheets that I've seen before include "Bedclothes to be found on ships?" , "Bed coverings for the sailor's ropes" , "Pieces of paper and bed linen" , "Flat pieces, of cloth or paper say" , "Bed covers" .)