A negative point, invariably (5)

I believe the answer is:

never

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

'a negative point invariably' is the definition.
I can't tell whether this defines the answer.

'point invariably' is the wordplay.
'point' becomes 'n' (N is an example).
'invariably' becomes 'ever' (I've seen this in another clue).
'n'+'ever'='NEVER'

Can you help me to learn more?

(Other definitions for never that I've seen before include "Surely not" , "Strong negative" , "Not in a million years!" , "I refuse" , "On no account" .)

I've seen this clue in the Evening Standard.

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