Standard element of McLaren's ignition (6)
I believe the answer is:
ensign
'standard' is the definition.
(thesaurus)
'element of mclaren's ignition' is the wordplay.
'element of' indicates the answer is hidden within the clue (I've seen this in other clues).
'ENSIGN' can be found hidden inside 'mclarens ignition'.
(Other definitions for ensign that I've seen before include "Standard - flag" , "Soldier who carries the Colours" , "Flying" , "In British infantry, a colours bearer" , "Flag indicating allegiance" .)