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The ClueFull stop (7 letter answer)
NotesThe answer IMPASSE is seen occasionally, appearing about once every 600 puzzles.
You can't escape from it
Immovable object vs. irresistible force
DefinitionIMPASSE as a noun:
1. (deadlock, dead end, impasse, stalemate, standstill) = a situation in which no progress can be made or no advancement is possible; "reached an impasse on the negotiations"
2. (blind alley, cul de sac, dead-end street, impasse) = a street with only one way in or out