Crossword Genius

English river’s constant — woman following it (6)

Ross

I believe the answer is:

itchen

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'english river's' is the definition.
I know nothing about this answer so I can't tell whether this works.

'constant woman following it' is the wordplay.
'constant' becomes 'c' (mathematical abbreviation).
'woman' becomes 'hen' ().
'following' is a charade indicator (letters next to each other).
'c'+'hen'='chen'
'chen' put after 'it' is 'ITCHEN'.

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