Loyalty shown by chap caught in hold (10)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

IAN (chap) + C (caught) contained by in ALLEGE (hold). I’m struggling to think of a context in which hold  = ALLEGE. They’re in the Chambers Crossword Dictionary and in Collins as synonyms, but no examples of usage are given. [Edit: Thanks to Galspray for  the example suggested below which I think works].