Eccentric old theologian (3)

I believe the answer is:

odd

'eccentric' is the definition.
(odd can mean eccentric or unusual)

'old theologian' is the wordplay.
'old' becomes 'o' (abbreviation as in OT - Old Testament).
'theologian' becomes 'DD' (Doctor of Divinity degree).
'o'+'dd'='ODD'

(Other definitions for odd that I've seen before include "Eccentric or unpaired" , "Not even? That's peculiar" , "Strange, bizarre" , "Not even - curious" , "Unusual, strange" .)

I've seen this clue in The Times.

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