Brandish weapon in front of English bard (11)
I believe the answer is:
shakespeare
'bard' is the definition.
(I've seen this before)
'brandish weapon in front of english' is the wordplay.
'brandish' becomes 'shake' (I've seen this in another clue).
'weapon' becomes 'spear' (spear is a kind of weapon).
'in front of' says to take the initial letters.
The initial letter of 'english' is 'e'.
'shake'+'spear'+'e'='SHAKESPEARE'
(Other definitions for shakespeare that I've seen before include "English poet" , "Author of Hamlet" , "As writer he is performed" , "See 12" , "The Bard of Avon" .)