13 across
PM
briefly
in
front
of
No.11
preparing
joint
(8)
PM briefly in front of No.11 preparing joint (8)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The preparing joint here is TRUSSING, as in tying up meat for roasting. We build it from TRUSS (a nod to short-lived PM Liz Truss, hence 'PM briefly'), then 'in' gives IN, and 'front of No.11' points to the first letter of the answer to 11 across, GRANDSTAND, giving G. String them together and you get TRUSSING.