A spoof about class mostly is to invite trouble (3,3,2)

I believe the answer is:

ask for it

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'invite trouble' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for ask for it that I've seen before include "Informally, invite or deserve trouble" , "Request PCs, perhaps" , "invite criticism" , "Invite trouble, behave provocatively" , "Invite ill" .)

I've seen this clue in The Times.

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