Fingers perhaps something found in excavations (6)
I believe the answer is:
digits
'fingers perhaps' is the definition.
(finger is a kind of digit)
'something found in excavations' is the wordplay.
'something' becomes 'it' (I've seen this in other clues).
'found in' indicates putting letters inside.
'excavations' becomes 'digs' ('dig' can be a synonym of 'excavation').
'it' inserted inside 'digs' is 'DIGITS'.
(Other definitions for digits that I've seen before include "One to nine" , "Fingers, toes and numbers" , "Numbers 0 to 9" .)