Oscar accommodated 51 female animals (8)
I believe the answer is:
'animals' is the definition.
(I've seen this before)
'oscar accommodated 51 female' is the wordplay.
I cannot quite understand how this works, but
'51' could be 'li' (roman numeral) and 'li' is present in the answer.
'female' could be 'f' (abbreviation) and 'f' is located in the answer.
'oscar' could be 'wilde' (playwright Oscar Wilde) and 'wilde' is located in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for wildlife that I've seen before include "All undomesticated creatures" , "All untamed creatures" , "certain fauna and flora?" , "All undomesticated living things" , "Undomesticated fauna and flora" .)