Finger or toe like that thing (5)
I believe the answer is:
digit
'finger or toe' is the definition.
(I've seen this in another clue)
'like that thing' is the wordplay.
'like' becomes 'dig' (I've seen this in another clue).
'that thing' becomes 'it'.
'dig'+'it'='DIGIT'
(Other definitions for digit that I've seen before include "a number less than ten" , "using 0 or 1 for example" , "A small number" , "Need a bit of a hand" , "one of several at hand" .)