Key stuck in public lav I salvaged (6)

I believe the answer is:

clavis

'key' is the definition.
(thesaurus)

'stuck in public lav i salvaged' is the wordplay.
'stuck in' says the answer is hidden in the clue.
'CLAVIS' can be found hidden inside 'public lav i salvaged'.

I've seen this clue in The Sunday Times and The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.