Crossword Genius

Meanwhile their tin mine collapses (2,3,7)

Ross

I believe the answer is:

in the interim

'meanwhile' is the definition.
(thesaurus)

'their tin mine collapses' is the wordplay.
'collapses' indicates an anagram.
'their'+'tin'+'mine'='theirtinmine'
'theirtinmine' with letters rearranged gives 'IN THE INTERIM'.

I've seen this clue in The Globe and Mail.
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.