Saw Charlie secured (7)

I believe the answer is:

clocked

'saw' is the definition.
(clock can mean to see or notice)

'charlie secured' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'secured' becomes 'locked' (synonyms).
'c'+'locked'='CLOCKED'

(Another definition for clocked that I've seen is " seen".)

I've seen this clue in The Guardian.

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