1 across
Why
it’s
hard
to
open
where
a
gap
is
unclosed
(4,3)
Why it’s hard to open where a gap is unclosed (4,3)
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hints
The definition is at the beginning of the clue.
How the clue works
Why is the definition. Take WATFORD (Watford Gap being 'where a gap is') and knock off its last letter for 'unclosed' to leave WATFOR, then open it up to drop in H for 'hard', giving W-H-ATFOR which reads as WHAT FOR.