Crossword Genius

There's no sole way to relax (6)

Ross

I believe the answer is:

loosen

'to relax' is the definition.
('loosen' can be a synonym of 'relax')

'there's no sole way' is the wordplay.
'there's' is a charade indicator (letters next to each other).
'way' is an anagram indicator (another way of arranging the letters).
'no'+'sole' is 'nosole'.
'nosole' is an anagram of 'LOOSEN'.

(Other definitions for loosen that I've seen before include "Make less tight, slacken" , "Relax the tension" , "Untie, relax" , "Work free" , "relax or tear apart" .)

I've seen this clue in the Evening Standard.
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