One cutting across the lawn? (5)
I believe the answer is:
mower
'one cutting across the lawn?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'one cutting across the lawn?' is the wordplay.
'one' becomes 'me' (a setter might use 'one' to humourously mean 'me').
'cutting' means to remove the last letter.
'across' is a charade indicator (letters next to each other) (across can mean on).
'the lawn?' becomes 'ower' (I am not sure about this - if you are sure you should believe this answer much more).
'me' with its last letter taken off is 'm'.
'm'+'ower'='MOWER'
Can you help me to learn more?
(Other definitions for mower that I've seen before include "Lawn cutter" , "Gardening equipment" , "Patrick _; Rodney Blackstock in Emmerdale" , "Machine for cutting grass" , "Grass cutter" .)