Popular queen meeting Spanish aunt resulting in inactivity (7)
I believe the answer is:
inertia
'inactivity' is the definition.
(I know that inactivity can be written as inertia)
'popular queen meeting spanish aunt' is the wordplay.
'popular' becomes 'in' (something that's 'in' is fashionable).
'queen' becomes 'ER' (short for Elizabeth Regina ie Queen Elizabeth).
'meeting' says to put letters next to each other.
'spanish aunt' becomes 'tia' ('aunt' in Spanish).
'in'+'er'+'tia'='INERTIA'
'resulting in' acts as a link.
(Other definitions for inertia that I've seen before include "Disposition to do nothing" , "Slowness to take action, state of laziness" , "Change-resisting tendency" , "Reluctance to change" , "Resistance to movement" .)