Dope's home telephone (5)
I believe the answer is:
intel
'dope's' is the definition.
(both can mean information)
'home telephone' is the wordplay.
I cannot really see how this works, but
'home' could be 'in' ('he's home' can mean 'he's in') and 'in' is found in the answer.
'telephone' could be 'tel' (short for telephone) and 'tel' is found within the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
(Other definitions for intel that I've seen before include "silicon chip manufacturer" , "US chip manufacturer" , "Information" , "Chip manufacturer based in California" , "military info" .)