Introduction of spray into armpit (having separated) stunning woman (9)
I believe the answer is:
bombshell
'introduction of spray' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'armpit having separated stunning woman' is the wordplay.
I cannot really see how this works, but
'woman' could be 'shell' and 'shell' is present in the answer.
The remaining letters 'bomb' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'into' acts as a link.
Can you help me to learn more?
(Other definitions for bombshell that I've seen before include "Explosion" , "Unpleasant surprise" , "big disappointment" , "Big surprise" , "Sudden and surprising piece of news" .)