Discharge from outlet an American partly picked up (7)
I believe the answer is:
emanate
'discharge' is the definition.
(thesaurus)
'outlet an american partly picked up' is the wordplay.
'partly' indicates the answer is hidden within the clue.
'picked up' says the letters should be written backwards.
'etaname' is hidden in the letters of 'outlet an american'.
'etaname' written backwards gives 'EMANATE'.
'from' is the link.
(Other definitions for emanate that I've seen before include "Proceed or issue forth" , "spring" , "Come forth" , "Issue or originate from manatee" , "Manatee (anag.)" .)