A new breed heading off half the adult population
alternatively you need bear movements
Pretty clearly
Aberdeen
It's sinister making a leg on the outside
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Separating the cryptic components from the indicators:
It's
sinister
making a leg on the outside
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Clue "making a leg" is a phrase; do not consider the words separately.
You need to find something meaning "making a leg" and place inside it something meaning "sinister".
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I had completely forgotten about this thread. If no one finds the answer today I will announce it tomorrow. I deliberately tried to clue this one without a reference to cricket, which would have been easier to answer (probably).