They hold Women’s Institute meeting with more senior people (8)
I believe the answer is:
wielders
'they hold' is the definition.
(people wielding or holding something)
'women's institute meeting with more senior people' is the wordplay.
'women' becomes 'w' (standard abbreviation).
'institute' becomes 'i' (common abbreviation as in MIT).
'meeting with' means one lot of letters go next to another.
'more' means one lot of letters go next to another (some letters added to the previous ones).
'senior people' becomes 'elders ' (I've seen this before).
'w'+'i'+'elders'='WIELDERS'
(Another definition for wielders that I've seen is " Managers".)