May make pleas about an indiscretion (5)

I believe the answer is:

lapse

I'm a little stuck... Click here to teach me more about this clue!

'an indiscretion' is the definition.
(I've seen this in another clue)

'may make pleas' is the wordplay.
'pleas' can be anagrammed to 'LAPSE'.
However, I'm not sure how this is indicated.

'about' is the link.

Can you help me to learn more?

(Other definitions for lapse that I've seen before include "Pass into disuse" , "breach of protocol?" , "Slip back" , "Retrogress" , "Error cause by weakness or inattention" .)

I've seen this clue in The Globe and Mail.

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