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Peer and knight, stuck in bathrooms, regularly vexed (4-3)

Ross

I believe the answer is:

look-see

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

'peer' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see a link between them that I don't see?

'knight stuck in bathrooms regularly vexed' is the wordplay.
'knight' becomes 'k'.
'stuck in' is an insertion indicator.
'bathrooms' becomes 'loos' (loo is a kind of bathroom).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternating letters of 'vexed' are 'ee'.
'k' inserted within 'loos' is 'looks'.
'looks'+'ee'='LOOK-SEE'

'and' acts as a link.

Can you help me to learn more?

(Other definitions for look-see that I've seen before include "Dekko" , "Survey, inspection" , "Young's - relates stress and strain (Physics)" , "Inspection (colloq.)" , "Brief inspection" .)

I've seen this clue in The Everyman puzzle in The Observer.
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