Divisible by two, therefore all the same? (4,2)
I believe the answer is:
even so
'all the same?' is the definition.
(synonyms)
'divisible by two therefore' is the wordplay.
'divisible by two' becomes 'even' (I've seen this before).
'therefore' becomes 'so' ('so' can mean 'consequently' or 'therefore').
'even'+'so'='EVEN SO'
(Other definitions for even so that I've seen before include "however" , "'Despite, still (4,2)'" , "anyway" , "Although that is the case, nevertheless" , "yet" .)