Distinguish and count a bit (4,5)
I believe the answer is:
tell apart
'distinguish' is the definition.
(I know that distinguish can be written as tell apart)
'count a bit' is the wordplay.
'count' becomes 'tell' (I've seen this before).
'bit' becomes 'part' (both can mean a piece of something).
'tell'+'a'+'part'='TELL APART'
'and' acts as a link.
(Other definitions for tell apart that I've seen before include "Rattle pal about - distinguish one from the other" , "See difference between" .)