Crossword Genius

Severity at the back? (9)

Ross

I believe the answer is:

sternness

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

This could be a double definition.

'severity' is the first definition.
(I know that sternness is a type of severity)

'the back?' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

'at' is the link.

Can you help me to learn more?

(Other definitions for sternness that I've seen before include "severity" , "Grimly serious quality" , "serious nature!" .)

I've seen this clue in The Irish Independent.
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