Spotted one cat he twice disturbed (7)
I believe the answer is:
cheetah
'spotted one' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'cat he twice disturbed' is the wordplay.
'he twice' can mean two substitutions for 'he'.
'disturbed' is an anagram indicator (the order of letters is disturbed).
'cat'+'he'+'he'='cathehe'
'cathehe' is an anagram of 'CHEETAH'.
Can you help me to learn more?
(Other definitions for cheetah that I've seen before include "Swift, spotted feline" , "Swift African cat" , "Carnivorous predator" , "Swift predator" , "quickie?" .)