Geezer has an antique watch (3,5)

I believe the answer is:

old timer

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

'geezer' is the definition.
(thesaurus)

'antique watch' is the wordplay.
'antique' becomes 'old' (similar in meaning).
'watch' becomes 'timer' (I've seen this before).
'old'+'timer'='OLD TIMER'

'has an' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for old timer that I've seen before include "clock?" , "person of experience" , "sundial?" , "Hourglass" , "Grandad" .)

I've seen this clue in the Sydney Morning Herald.

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