Closely examine second container (4)

I believe the answer is:

scan

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

'closely examine' is the definition.
'scan' can be an answer for 'examine' (scanning is a kind of examining). I am not certain of the 'closely' bit.

'second container' is the wordplay.
'second' becomes 's' (common abbreviation).
'container' becomes 'can' (can is a kind of container**).
's'+'can'='SCAN'

Can you help me to learn more?

(Other definitions for scan that I've seen before include "Skim; examine" , "Examine quickly" , "Study the metre" , "View quickly" , "Medical procedure" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app