Fakes, one assumes (4,2)

I believe the answer is:

puts on

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This clue could be a double definition.

'fakes one' is the first definition.
The definition and answer can be both to do with communicating as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

'assumes' is the second definition.
The definition and answer can be both related to change as well as being verbs in their -s form.
Maybe there's an association between them I don't understand?

Can you help me to learn more?

(Another definition for puts on that I've seen is " Dons".)

I've seen this clue in the Evening Standard.

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