Goes off to get the sheets (6)
I believe the answer is:
leaves
I believe this clue is a double definition.
'goes off' is the first definition.
(I've seen this in another clue)
'the sheets' is the second definition.
(leaf is a kind of sheet)
'to get' is the link.
(Other definitions for leaves that I've seen before include "Pour hot fat over (meat)" , "Departs with what fall in the Fall" , "takes off" , "Doesn't eat" , "''All the ... are brown'' (California Dreamin')" .)