Boisterous jaunt for military clique (5)
I believe the answer is:
junta
'military clique' is the definition.
(I've seen this before)
'boisterous jaunt' is the wordplay.
'boisterous' is an anagram indicator (I've seen this in other clues).
'jaunt' with letters rearranged gives 'JUNTA'.
'for' acts as a link.
(Other definitions for junta that I've seen before include "Group seizing power" , "post-coup government" , "Military clique of rulers" , "unelected rulers" , "Jaunt (anag.)" .)