Crossword Genius

Paul was one, always carrying weapon (9)

Ross

I believe the answer is:

epistoler

'paul was one' is the definition.
(St Paul wrote epistles or letters)

'always carrying weapon' is the wordplay.
'always' becomes 'eer' (poetic way of saying ever).
'carrying' means one lot of letters goes inside another.
'weapon' becomes 'pistol' (pistol is a kind of weapon).
'eer' placed around 'pistol' is 'EPISTOLER'.

(Another definition for epistoler that I've seen is " Perhaps man of letters".)

I've seen this clue in The Times.
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