Crossword Genius

Sometime the morning after, having the test (4)

Ross

I believe the answer is:

exam

'the test' is the definition.
('exam' can be a synonym of 'test')

'sometime the morning after' is the wordplay.
'sometime' becomes 'ex' (prefix meaning former or onetime).
'the morning' becomes 'am'.
'after' is a charade indicator (letters next to each other).
'ex'+'am'='EXAM'

'having' is the link.

(Other definitions for exam that I've seen before include "(Academic) test" , "In brief, a test as in school" , "Test (abbr)" , "Educational test" , "Important test" .)

I've seen this clue in the Evening Standard.
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