Parade to show support (5)
I believe the answer is:
strut
This clue is a double definition.
'parade' is the first definition.
(I've seen this in another clue)
'support' is the second definition.
(strut is a kind of support)
'to show' acts as a link.
(Other definitions for strut that I've seen before include "Walk proudly like metal support" , "Walk arrogantly" , "parade" , "Walk with proud and conceited gait" , "Supportive member" .)