Too old? Absolutely, about 50 (6)

I believe the answer is:

overly

'too' is the definition.
('overly' can be a synonym of 'too')

'old? absolutely about 50' is the wordplay.
'old?' becomes 'o' (common abbreviation eg in OE for Old English).
'absolutely' becomes 'very' (I've seen this before**).
'about' is an insertion indicator.
'50' becomes 'l' ('L' can be a synonym of '50').
'very' enclosing 'l' is 'verly'.
'o'+'verly'='OVERLY'

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

I've seen this clue in The Telegraph.

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