Habitat of sleek mammal with no tail (3)
I believe the answer is:
sea
'habitat of sleek' is the definition.
I can't judge whether this defines the answer.
'mammal with no tail' is the wordplay.
'mammal' becomes 'seal' (type of mammal).
'with no tail' means to remove the last letter.
'seal' with its final letter taken off is 'SEA'.
Can you help me to learn more?
(Other definitions for sea that I've seen before include "Large body of salt water" , "Watery expanse" , "It's stocked with fish" , "The deep" , "The Aegean, for example" .)