28 across
Recalled
vote
against
including
University
guy
in
part
of
Mexican
trip
(7)
Recalled vote against including University guy in part of Mexican trip (7)
hints
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checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is part of Mexican trip — specifically a region of Mexico, with "trip" just there to throw you off. NAY (your vote against) gets recalled (reversed) to give YAN, then you slot in University (U) and guy (CAT) inside it to build Y-UCAT-AN.