Unruly passenger blocked by old VIPs (10)
I believe the answer is:
personages
'vips' is the definition.
(I've seen this before)
'unruly passenger blocked by old' is the wordplay.
'unruly' indicates anagramming the letters.
'blocked by' is an insertion indicator (upper walls off glass inside formal).
'old' becomes 'o' (abbreviation).
'passenger' is an anagram of 'persnages'.
'persnages' placed around 'o' is 'PERSONAGES'.
(Other definitions for personages that I've seen before include "characters" , "VIPs" .)