A cheap combination in helicopter (6)
I believe the answer is:
apache
'helicopter' is the definition.
(US army helicopter)
'a cheap combination in' is the wordplay.
'combination' is an anagram indicator.
'in' indicates putting letters inside.
'cheap' with letters rearranged gives 'apche'.
'a' going inside 'apche' is 'APACHE'.
(Other definitions for apache that I've seen before include "Parisian ruffian - Indian" , "Tribal type" , "Hooligan in Paris" , "nickname of US State" , "on the streets of Paris" .)