Crossword Genius

Having a telephone conversation while the clothes are drying? (2,3,4)

Ross

I believe the answer is:

on the line

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(Other definitions for on the line that I've seen before include "At risk - or speaking on telephone" , "when one is at risk" , "Using the phone" , "Caller may be" , "At serious risk" .)

I've seen this clue in the Evening Standard.
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