Frothy talk about a politician making umbrellas (5)

I believe the answer is:

gamps

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'umbrellas' is the definition.
(gamp is a kind of umbrella)

'frothy talk about a politician' is the wordplay.
'frothy talk' becomes 'gas' (I've seen this before. I am not sure about the 'frothy' bit.**).
'about' means one lot of letters goes inside another.
'a politician' becomes 'mp'.
'gas' placed around 'mp' is 'GAMPS'.

'making' is the link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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