Pop star perhaps showing authority (6,6)
I believe the answer is:
father figure
'authority' is the definition.
(I've seen this before)
'pop star perhaps' is the wordplay.
'pop' becomes 'father' (I've seen this in another clue).
'star perhaps' becomes 'figure' (star is a kind of figure).
'father'+'figure'='FATHER-FIGURE'
'showing' is the link.
(Other definitions for father figure that I've seen before include "authority" , "admired senior" .)