Crossword Genius

Recalled personnel department in head office indicating one could be endangered (5)

Ross

I believe the answer is:

rhino

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

'one could be endangered' is the definition.
I can't tell whether this defines the answer.

'recalled personnel department in head office' is the wordplay.
'recalled' says the letters should be written backwards (to recall can mean to bring something back).
'personnel department' becomes 'HR' (Human Resources).
'head' indicates taking the first letters.
The first letter of 'office' is 'o'.
'hr' reversed gives 'rh'.
'rh'+'in'+'o'='RHINO'

'indicating' acts as a link.

Can you help me to learn more?

(Other definitions for rhino that I've seen before include "Hi, Ron! (anag)" , "Thick-skinned animal (abbr) - money (slang)" , "Dosh (slang)" , "Large animal with a horn on its snout, in short" , "Hi, Ron, this animal is abbreviated" .)

I've seen this clue in The Irish Times.
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