Couple of Englishmen make a fancy ball (6)
I believe the answer is:
pompom
'a fancy ball' is the definition.
'pompom' can be an answer for 'ball' (I've seen this before). I'm not sure about the 'a fancy' bit.
'couple of englishmen' is the wordplay.
'couple of' shows that letters should be duplicated.
'englishmen' becomes 'pom' (I am not sure about this - if you are sure you should believe this answer much more).
'pom' doubled is 'POMPOM'.
'make' acts as a link.
Can you help me to learn more?
(Other definitions for pompom that I've seen before include "Anti-aircraft weapon" , "Fluffy ball - type of gun" , "fluffy decoration" , "Decorative ball of tufted wool" , "Top decoration" .)