Caught in a shady deal (3)

I believe the answer is:

had

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'caught' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?

'in a shady deal' is the wordplay.
'in' indicates a hidden word.
'HAD' can be found hidden inside 'shady deal'.

Can you help me to learn more?

(Other definitions for had that I've seen before include "Possessed; cheated" , "kept" , "Owned in the past" , "Taken in" , "Did trick" .)

I've seen this clue in the Evening Standard.

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