Possibly iron tin opener used during dinner (5)

I believe the answer is:

metal

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'possibly iron' is the definition.
'metal' can be an answer for 'iron' (I've seen this before). I am not sure about the 'possibly' bit.

'tin opener used during dinner' is the wordplay.
'opener' says to take the initial letters.
'used during' is an insertion indicator.
'dinner' becomes 'meal' (dinner is a meal).
The initial letter of 'tin' is 't'.
't' going inside 'meal' is 'METAL'.

Can you help me to learn more?

(Other definitions for metal that I've seen before include "Headbanger's music genre" , "Alloy" , "Gold or silver in heraldry" , "Zirconium, for example" , "Aluminium or copper for instance" .)

I've seen this clue in the Evening Standard.

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