Deadlock, no progress can be made (7)

I believe the answer is:

impasse

(Other definitions for impasse that I've seen before include "Situation in which progress is impossible" , "'Deadlock, stalemate (7)'" , "Standstill" , "Unpromising situation" , "failure to progress" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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