Not wanting any nonsense, take pig away to have a bath (4)

I believe the answer is:

wash

I'm a little stuck... Click here to teach me more about this clue!

'bath' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for wash that I've seen before include "Rough water left by a moving boat" , "Clean with liquid" , "Flow over" , "Bear investigation" , "wake" .)

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app