Auntie, perhaps, runs out in euphoria (7)
I believe the answer is:
elation
'euphoria' is the definition.
(I've seen this in another clue)
'auntie perhaps runs out' is the wordplay.
'auntie perhaps' becomes 'relation' (auntie is a type of relative or relation).
'runs' becomes 'r' (cricket abbreviation).
'out' is a deletion indicator.
'relation' with 'r' removed is 'ELATION'.
'in' acts as a link.
(Other definitions for elation that I've seen before include "Exaltation" , "exhibits successful pride" , "'High spirits, exhilaration (7)'" , "Feeling of intense delight" , "Euphoria of toenail" .)