Never off for Yule I suspect (3,2,4,4)
I believe the answer is:
not on your life
'never' is the definition.
(phrase meaning 'never' or 'absolutely not')
'off for yule i suspect' is the wordplay.
'off' becomes 'noton' (both can mean unacceptable or wrong).
'suspect' indicates anagramming the letters (a suspicious or unusual spelling).
'for'+'yule'+'i'='foryulei'
'foryulei' anagrammed gives 'yourlife'.
'noton'+'yourlife'='NOT ON YOUR LIFE'
(Other definitions for not on your life that I've seen before include "Expression of strong denial" , "No way!" , "Like someone else's autobiography" , "Under no circumstances" , "Emphatically, no!" .)