See fencing exercise scratching face? It shouldn't (4)
I believe the answer is:
epee
'shouldn't' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'see fencing exercise scratching face? it' is the wordplay.
'see fencing' is an insertion indicator (to fence can mean to contain or put a limit round).
'exercise' becomes 'pe' (Physical Education).
'scratching face?' becomes 'e' (I am not sure about this - if you are sure you should believe this answer much more).
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'e'+'e'='ee'
'pe' placed inside 'ee' is 'EPEE'.
Can you help me to learn more?
(Other definitions for epee that I've seen before include "Fencing sword similar to a foil" , "Narrow fencing sword" , "Fencer's weapon" , "Fencer's sword" , "sharp-edged implement" .)