Innocent U.S. lawyer gets overseas letter (6)
I believe the answer is:
lambda
'letter' is the definition.
(letter of the Greek alphabet)
'innocent u s lawyer gets overseas' is the wordplay.
I cannot really understand how this works, but
'innocent' could be 'lamb' (I've seen this in another clue) and 'lamb' is located in the answer.
'lawyer' could be 'da' (district attorney) and 'da' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for lambda that I've seen before include "part of the skull" , "Steps taken" , "Greek letter - am bald (anag)" , "Not one of our characters" , "Eleventh Greek letter" .)