Almost a disaster - the gin ran out (4,5)
I believe the answer is:
near thing
'almost a disaster' is the definition.
(I've seen this before)
'the gin ran out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'the'+'gin'+'ran'='theginran'
'theginran' anagrammed gives 'NEAR THING'.
(Other definitions for near thing that I've seen before include "Something that barely avoids failure or disaster" , "Knife-edge event" , "almost an accident" , "Narrow escape, close shave" , "Narrow escape, missed by a small margin (4.5)" .)