Slowly advanced to Ohio (5)

I believe the answer is:

lento

'slowly' is the definition.
('lento' can be a synonym of 'slowly')

'advanced to ohio' is the wordplay.
'advanced' becomes 'lent' (money).
'to ohio' becomes 'o'.
'lent'+'o'='LENTO'

(Other definitions for lento that I've seen before include "Old sayings" , "Slow musically" , "Instruction to players" , "Slowly (mus.)" , "Slow passage" .)

I've seen this clue in The Telegraph.

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