Tablet dad found amongst papers (4)
I believe the answer is:
ipad
'tablet' is the definition.
(tablet made by Apple)
'dad found amongst papers' is the wordplay.
'dad' becomes 'pa' (pa can mean someone's father).
'found amongst' is an insertion indicator (inserted letters are placed amongst others).
'papers' becomes 'ID' (identifying documents are one's 'papers').
'pa' going into 'id' is 'IPAD'.
(Other definitions for ipad that I've seen before include "Small personal computer" , "Tablet computer from Apple" .)