Be careful today, I see struggles over Sunday (4,4,2)
I believe the answer is:
easy does it
'be careful' is the definition.
(I've seen this before)
'today i see struggles over sunday' is the wordplay.
'struggles' indicates anagramming the letters.
'over' is an insertion indicator.
'sunday' becomes 's'.
'today'+'i'+'see'='todayisee'
'todayisee' anagrammed gives 'eaydoesit'.
'eaydoesit' placed around 's' is 'EASY DOES IT'.
(Other definitions for easy does it that I've seen before include "Don't stress yourself!" , "relax" , "Take your time" , "Gently" , "Be careful" .)