Scottish river, just direct (10)

I believe the answer is:

forthright

'direct' is the definition.
(similar in meaning)

'scottish river just' is the wordplay.
'scottish river' becomes 'forth' (I've seen this before).
'just' becomes 'right' (similar in meaning).
'forth'+'right'='FORTHRIGHT'

(Other definitions for forthright that I've seen before include "Candid" , "Open" , "Frank and uninhibited" , "Direct, outspoken" , "straightforward" .)

I've seen this clue in The Times.

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