Not strict diet, so anyhow take your time (4,4,2)
I believe the answer is:
easy does it
'take your time' is the definition.
(I've seen this before)
'not strict diet so anyhow' is the wordplay.
'not strict' becomes 'easy' (I can't justify this - if you can you should believe this answer much more).
'anyhow' indicates anagramming the letters.
'diet'+'so'='dietso'
'dietso' with letters rearranged gives 'doesit'.
'easy'+'doesit'='EASY DOES IT'
Can you help me to learn more?
(Other definitions for easy does it that I've seen before include "relax" , "Don't stress yourself!" , "What satisfies "Simple (4)"?" , "Take your time" , "Gently" .)