A left arm which may be raised (5)
I believe the answer is:
alarm
'a left arm which may be raised' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'a left arm' is the wordplay.
'left' becomes 'l' (common abbreviation).
'a'+'l'+'arm'='ALARM'
Can you help me to learn more?
(Other definitions for alarm that I've seen before include "Agitate" , "uneasiness" , "Device signalling danger" , "with which many awake to in the morning" , "Arouse to a sense of danger" .)