More inquisitive senior is confused (6)
I believe the answer is:
'more inquisitive' is the definition.
(I've seen this before)
'senior is confused' is the wordplay.
'is confused' is an anagram indicator.
'senior' is an anagram of 'NOSIER'.
(Other definitions for nosier that I've seen before include "Senior (anag)" , "More curious in nasal way" , "rather curious" , "comparatively curious" , "More curious, being senior" .)