Solitary, single (4)

I believe the answer is:

lone

This clue is a double definition.

'solitary' is the first definition.
(synonyms)

'single' is the second definition.
(synonyms)

(Other definitions for lone that I've seen before include "The ... Ranger, fictional masked cowboy" , "Single and isolated" , "Solitary, without companions" , "He likes to operate by himself" , "Solitary or single" .)

I've seen this clue in The Sun.

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