Blunt bishop leaves with direct old abbot (7)

I believe the answer is:

aldhelm

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'old abbot' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'blunt bishop leaves with direct' is the wordplay.
'blunt' becomes 'bald' (bald can mean blunt or brazen).
'bishop' becomes 'B' (chess abbreviation).
'leaves' is a deletion indicator.
'with direct' becomes 'helm' (I am not sure about this - if you are sure you should believe this answer much more).
'bald' with 'b' taken out is 'ald'.
'ald'+'helm'='ALDHELM'

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I've seen this clue in The Guardian.

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