Some cameleers in skirmish (5)
I believe the answer is:
melee
'skirmish' is the definition.
(I've seen this before)
'some cameleers in' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'MELEE' can be found hidden inside 'cameleers in'.
(Other definitions for melee that I've seen before include "Noisy riotous fight" , "Affray; muddled group" , "A confused free-for-all" , "Fracas" , "Confused fight or scuffle" .)