Annoyed by a haughty clique (5)
I believe the answer is:
upset
'annoyed' is the definition.
(I've seen this before)
'by a haughty clique' is the wordplay.
'by' says to put letters next to each other.
'a haughty' becomes 'up' (I can't justify this - if you can you should believe this answer much more).
'clique' becomes 'set' (I've seen this before).
'up' put next to 'set' is 'UPSET'.
Can you help me to learn more?
(Other definitions for upset that I've seen before include "Disturb or distress" , "Distraught" , "Put out" , "Trouble" , "Discountenanced" .)