Streams able to put right ailments (5)

I believe the answer is:

rills

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'streams' is the definition.
(rill is a kind of stream)

'right ailments' is the wordplay.
'right' becomes 'r' (common abbreviation).
'ailments' becomes 'ills' ('ill' can be a synonym of 'ailment').
'r'+'ills'='RILLS'

'able to put' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.

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(Other definitions for rills that I've seen before include "Rivulets, runnels" , "Small streams" .)

I've seen this clue in the Evening Standard.

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