Digit between numbers three and five? (4,6)
I believe the answer is:
ring finger
'digit' is the definition.
(ring finger is a kind of digit)
'between numbers three and five?' is the wordplay.
I cannot really understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
'five?' could be 'fin' ('fin' can be a synonym of 'five') and 'fin' is present in the answer.
The remaining letters 'rigger' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Another definition for ring finger that I've seen is " Digit for the marital gold band".)