Crossword Genius

Lay it on with "I am to act as model" (6)

Ross

I believe the answer is:

impose

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

'lay' is the definition.
(thesaurus)

'as model' is the wordplay.
'as' becomes 'im' (I can't justify this - if you can you should give a lot more credence to this answer).
'model' becomes 'pose' (model can mean to pose).
'im'+'pose'='IMPOSE'

'it on with i am to act' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for impose that I've seen before include "Exact or levy, say tax" , "Be a bother" , "institute" , "Force on or take advantage of" , "Put burden or tax on" .)

I've seen this clue in the Evening Standard.
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