Opening weekend's evening act postponed over nasty gun (6)
I believe the answer is:
weapon
'nasty gun' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'opening weekend's evening act postponed over' is the wordplay.
'opening' suggests taking the first letters.
'over' becomes 'on' (physically on top of).
The initial letters of 'weekends evening act postponed' is 'weap'.
'weap'+'on'='WEAPON'
Can you help me to learn more?
(Other definitions for weapon that I've seen before include "Offensive device" , "Means of fighting" , "Thing used to cause bodily harm" , "Instrument of attack or defence" , "Arm" .)