Goes off to get the sheets (6)
I believe the answer is:
leaves
'goes off' is the definition.
'leaves' can be an answer for 'goes' (leaving is a kind of going). I'm unsure of the 'off' bit.
'get the sheets' is the wordplay.
'get' becomes 'leave' (leaving is a kind of getting).
'the sheets' becomes 's' (this might be a standard abbreviation of which I'm unaware).
'leave'+'s'='LEAVES'
'to' acts as a link.
Can you help me to learn more?
(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')" .)