Crossword Genius

Forest officer called by monarch (6)

Ross

I believe the answer is:

ranger

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

'forest officer' is the definition.
(I've seen this before)

'called by monarch' is the wordplay.
'called' becomes 'rang' ('ring' can be a synonym of 'call').
'by monarch' becomes 'er' (abbreviation for Elizabeth Regina, British Queen. I am not sure about the 'by' bit.).
'rang'+'er'='RANGER'

Can you help me to learn more?

(Other definitions for ranger that I've seen before include "Park warden" , "Forest defender" , "park-keeper" , "Forest or park officer" , "National park officer" .)

I've seen this clue in The Sun.
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