Go out for a bit? (3)
I believe the answer is:
nap
'go out for a bit?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nap that I've seen before include "A brief informal sleep" , "Pile of material" , "Quick sleep; raised pile" , "Raised fibres on surface of cloth or leather" , "Take forty winks" .)