Dad ceased dancing outside as a stunt (8)
I believe the answer is:
escapade
'a stunt' is the definition.
(I've seen this before)
'dad ceased dancing outside' is the wordplay.
'dad' becomes 'pa' (synonyms).
'dancing' indicates anagramming the letters.
'outside' indicates putting letters inside.
'ceased' anagrammed gives 'escade'.
'pa' put inside 'escade' is 'ESCAPADE'.
'as' acts as a link.
(Other definitions for escapade that I've seen before include "Mischievous exploit" , "Daring stunt" , "Mischievous romp" , "Wild adventure" , "A piece of reckless or mischievous conduct" .)