Males from Mars (4)

I believe the answer is:

rams

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'males' is the definition.
The answer and definition can be both animals as well as being plural nouns.
Maybe there's a link between them I don't understand?

'from mars' is the wordplay.
'from' is an anagram indicator (from the letters).
'mars' is an anagram of 'RAMS'.

Can you help me to learn more?

(Other definitions for rams that I've seen before include "drives" , "Bangs into as car might" , "Batters like male sheep?" , "Hits; sheep" .)

I've seen this clue in the Evening Standard.

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