Short with German monarch (5)

I believe the answer is:

under

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'short' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'with german monarch' is the wordplay.
'with german' becomes 'und' ('and' in German).
'monarch' becomes 'ER' (abbreviation for Elizabeth Regina, British Queen).
'und'+'er'='UNDER'

Can you help me to learn more?

(Other definitions for under that I've seen before include "Less than" , "Beneath or subordinate to" , "In a state of unconsciousness" , "Managed by" , "Sub" .)

I've seen this clue in The Sun.

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