Kyiv outskirts battling with real tough stuff (6)

I believe the answer is:

kevlar

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'tough stuff' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'kyiv outskirts battling with real' is the wordplay.
'outskirts' means to remove the middle letters (I've seen 'outskirts of' mean this).
'battling with' is an anagram indicator (I've seen 'battle' mean this (the letters disrupted as if in battle)).
'kyiv' with its middle taken out is 'kv'.
'kv' mixed up with 'real' makes 'KEVLAR'.

Can you help me to learn more?

(Another definition for kevlar that I've seen is " Material in bullet-proof vests".)

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

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