Put carelessly as friends come round (4)
I believe the answer is:
slap
'put carelessly' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'friends come round' is the wordplay.
'friends' becomes 'pals' (pal is a kind of friend).
'come round' is a reversal indicator (I've seen 'coming round' mean this).
'pals' written backwards gives 'SLAP'.
'as' is the link.
Can you help me to learn more?
(Other definitions for slap that I've seen before include "Strike with the palm" , "Blow with open hand" , "Hit with a flat hand" , "Strike (in the face)" , "Blow (in face, on back, wrist)" .)