Travel pioneer, one who doubted worker in galley? (6,4)

I believe the answer is:

thomas cook

'travel pioneer' is the definition.
(UK travel agent)

'one who doubted worker in galley?' is the wordplay.
'one who doubted' becomes 'thomas' (Biblical figure Doubting Thomas).
'worker in galley?' becomes 'cook' (a ship's kitchen is a galley).
'thomas'+'cook'='THOMAS COOK'

I've seen this clue in The Times.

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