Crossword Genius

Keep shower curtains outside for event (6)

Ross

I believe the answer is:

retain

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'keep' is the definition.
(synonyms)

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(Other definitions for retain that I've seen before include "'Hold, keep back (6)'" , "Hold onto" , "Not relinquish" , "Keep in Tirane" , "Save" .)

I've seen this clue in The Independent.
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