Be daft and get hot playing with a cat (3,3,4)
I believe the answer is:
act the goat
'be daft' is the definition.
I know nothing about this answer so I can't tell whether this works.
'get hot playing with a cat' is the wordplay.
'playing with' indicates an anagram.
'get'+'hot'='gethot'
'a'+'cat'='acat'
'gethot' anagrammed with 'acat' makes 'ACT THE GOAT'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for act the goat that I've seen before include "clown" , "Fool around" , "Behave stupidly" .)