Army brass to annoy the French (5)
I believe the answer is:
bugle
'army brass' is the definition.
'bugle' can be an answer for 'brass' (bugle is a kind of brass). I am unsure of the 'army' bit.
'annoy the french' is the wordplay.
'annoy' becomes 'bug' (I've seen this in another clue).
'the french' becomes 'le' ('the' in French).
'bug'+'le'='BUGLE'
'to' is the link.
Can you help me to learn more?
(Other definitions for bugle that I've seen before include "Part of brass" , "Instrument used for military signals" , "A military trumpet" , "It's used for military calls" , "An army trumpet" .)