Crossword Genius

Many battles over hat with a floral emblem (7)

Ross

I believe the answer is:

waratah

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

'floral emblem' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'many battles over hat with a' is the wordplay.
I cannot quite see how this works, but
'battles' could be 'war' (I've seen this in other clues) and 'war' is present in the answer.
an anagram of 'hat' is 'tah' which is within the answer.
'a' is within the answer.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

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