Crossword Genius

Serviceman, possibly, using a rifle (5)

Ross

I believe the answer is:

flier

I'm a little stuck... Click here to teach me more about this clue!

'serviceman' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'using a rifle' is the wordplay.
'using' indicates anagramming the letters (the letters used in a different way).
'rifle' with letters rearranged gives 'FLIER'.

'possibly' is the link.

Can you help me to learn more?

(Other definitions for flier that I've seen before include "Rifle for airman" , "Circular" , "Leaflet for distribution" , "Risk" , "Aviator" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app