Isn’t cleared after waving ID? (11)
I believe the answer is:
credentials
'id?' is the definition.
(someone's identification or papers)
'isn't cleared after waving' is the wordplay.
'after' says to put letters next to each other.
'waving' is an anagram indicator (letters wave around).
'isnt'+'cleared'='isntcleared'
'isntcleared' is an anagram of 'CREDENTIALS'.
(Other definitions for credentials that I've seen before include "Qualifications" , "Documentary evidence of competence" , "used for identification" , "Ambassador's letter of introduction" .)