Crossword Genius

Hostile crowds make headmistress Juliet quit jobs (4)

Ross

I believe the answer is:

mobs

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

'hostile crowds' is the definition.
'mobs' can be an answer for 'crowds' (mob is a kind of crowd). I'm not sure about the 'hostile' bit.

'headmistress juliet quit jobs' is the wordplay.
'headmistress' becomes 'm' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'juliet' becomes 'J' (phonetic alphabet: alpha, bravo, charlie etc.).
'quit' suggests deleting specific letters.
'jobs' with 'j' removed is 'obs'.
'm'+'obs'='MOBS'

'make' acts as a link.

Can you help me to learn more?

(Other definitions for mobs that I've seen before include "Disorderly crowds of people" , "Unruly crowds" , "riotous assemblies" .)

I've seen this clue in the Sydney Morning Herald.
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