New tags in dad's can or bucket (4,4,3,4)
I believe the answer is:
rain cats and dogs
'bucket' is the definition.
(I've seen this before)
'new tags in dad's can or' is the wordplay.
'new' indicates an anagram.
'tags'+'in'+'dads'+'can'+'or'='tagsindadscanor'
'tagsindadscanor' is an anagram of 'RAIN CATS AND DOGS'.
(Other definitions for rain cats and dogs that I've seen before include "Pelt" , "To fall heavily" , "bucket" , "come down hard" , "Pour" .)