New Zealand's Premier overused exercises in meeting (10)
I believe the answer is:
rendezvous
'meeting' is the definition.
(a rendezvous is a meeting or appointment)
'new zealand's premier overused exercises' is the wordplay.
'premier' indicates taking the first letters.
'exercises' is an anagram indicator (letters exercise or move around).
The initial letters of 'new zealand' is 'nz'.
'nz'+'overused'='nzoverused'
'nzoverused' with letters rearranged gives 'RENDEZVOUS'.
'in' is the link.
(Other definitions for rendezvous that I've seen before include "Appointment" , "Date" , "Meeting place" , "Meet - meeting" , "Meeting-place" .)