Fighters who got cross when the Boers were around? (6)
I believe the answer is:
boxers
'fighters who got cross when the boers were around?' is the definition.
'boxers' can be an answer for 'fighters' (boxer is a kind of fighter). I'm not sure about the remainder of the definition.
'fighters who got cross when' is the wordplay.
'fighters who' becomes 'bors' (I can't justify this - if you can you should believe this answer much more).
'got' is an insertion indicator.
'cross' becomes 'x' (X is cross-shaped).
'when' becomes 'e' (I've seen this in other clues).
'x'+'e'='xe'
'bors' enclosing 'xe' is 'BOXERS'.
Can you help me to learn more?
(Other definitions for boxers that I've seen before include "Pugilists or men's underwear" , "Pugs; dogs" , "in the ring with shorts" , "Dogs or men's loose underpants" , "Dogs; packers" .)