It's not unusual and not masculine (4)

I believe the answer is:

norm

I'm a little stuck... Click here to teach me more about this clue!

'it's not unusual' is the definition.
I can't tell whether this definition defines the answer.

'and not masculine' is the wordplay.
'and not' becomes 'nor' ('nor' means 'and also not').
'masculine' becomes 'm'.
'nor'+'m'='NORM'

Can you help me to learn more?

(Other definitions for norm that I've seen before include "Small boy" , "Required or acceptable standard" , "Bacterium, virus, etc" , "Mean" , "Usual or standard thing" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app