We rip off a window cleaner (5)

I believe the answer is:

wiper

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

'a window cleaner' is the definition.
'wiper' can be an answer for 'cleaner' (I've seen this before). I am not sure about the 'a window' bit.

'we rip off' is the wordplay.
'off' is an anagram indicator.
'we'+'rip'='werip'
'werip' is an anagram of 'WIPER'.

Can you help me to learn more?

(Other definitions for wiper that I've seen before include "Windscreen cleaner" , "contact in the electrical world" , "Moving electrical contact" , "Feature of car" , "Window-cleaner" .)

I've seen this clue in The Globe and Mail.

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