Group showing a bit of patriotism (4)
I believe the answer is:
trio
'group' is the definition.
(a group of three)
'a bit of patriotism' is the wordplay.
'a bit of' indicates a hidden word (I've seen 'a bit' mean this (the answer is formed by a bit of the clue)).
'TRIO' is hidden in the letters of 'patriotism'.
'showing' acts as a link.
(Other definitions for trio that I've seen before include "Group of three (musicians)" , "Beethoven's 'Archduke': famous piece written for this ensemble" , "Chamber group" , "Archduke, possibly" , "Threesome" .)