It may be taken in hand by Gurkhas (5)
I believe the answer is:
kukri
'it may be taken in hand by gurkhas' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for kukri that I've seen before include "Gurkha's curved knife" , "Asian weapon" , "Gurkha knife" , "Weapon used by Gurkhas" .)