Cool-headed individual helping in traffic control (4)
I believe the answer is:
cone
'helping in traffic control' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'cool-headed individual' is the wordplay.
'cool-headed' becomes 'c' (this might be a standard abbreviation which I don't know about).
'individual' becomes 'one' (an individual is one person).
'c'+'one'='CONE'
Can you help me to learn more?
(Other definitions for cone that I've seen before include "Volcanic peak" , "Tapering object" , "Solid figure" , "Tapered object" , "Hollow object associated with ice cream and motorways" .)