Draw a gun? (5)
I believe the answer is:
train
This clue could be a double definition.
'draw' is the first definition.
(thesaurus)
'a gun?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
Can you help me to learn more?
(Other definitions for train that I've seen before include "Choo-choo or part of wedding dress" , "Trailing part of bridal dress" , "tutor" , "Teach (someone) a skill" , "become physically fit" .)