Complains of illegalities in exams? (5)

I believe the answer is:

cribs

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This could be a double definition.

'complains' is the first definition.
Although both the answer and definition are verbs in their -s form, I can't see how they can define each other.

'illegalities in exams?' is the second definition.
The answer and definition can be both related to communication as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'of' acts as a link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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