Bottle – neck (5)
I believe the answer is:
nerve
I believe this is a double definition.
'bottle' is the first definition.
(both can mean courage)
'neck' is the second definition.
(both can mean attitude or insolence)
(Other definitions for nerve that I've seen before include "Cheek; self-possession" , "Cool courage" , "Cord that carries instructions from brain to body" , "Bottle, courage" , "Strand of body fibre" .)