Creatures from Mars? (4)
I believe the answer is:
rams
'creatures' is the definition.
The definition and answer can be both animals as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'from mars?' is the wordplay.
'from' is an anagram indicator (the anagram comes from the same letters).
'mars' anagrammed gives 'RAMS'.
Can you help me to learn more?
(Other definitions for rams that I've seen before include "Batters like male sheep?" , "Hits; sheep" , "drives" , "Bangs into as car might" .)