Crossword Genius

Having taken a look at, left (7,3)

Ross

I believe the answer is:

checked out

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

'having taken a look at left' is the definition.
I can't tell whether this defines the answer.

'taken a look at left' is the wordplay.
'taken a look at' becomes 'checked' (checking is a kind of taking a look at).
'left' becomes 'out' (I can't explain this - if you can you should believe this answer much more).
'checked'+'out'='CHECKED OUT'

Can you help me to learn more?

(Another definition for checked out that I've seen is " investigated".)

I've seen this clue in the Evening Standard.
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