Flow out from faucet an American turned partially (7)
I believe the answer is:
emanate
'flow out from' is the definition.
(I've seen this before)
'faucet an american turned partially' is the wordplay.
'partially' indicates the answer is hidden within the clue.
'turned' is a reversal indicator.
'etaname' can be found hidden inside 'faucet an american'.
'etaname' backwards is 'EMANATE'.
(Other definitions for emanate that I've seen before include "Rise" , "Proceed or issue forth" , "Come out (of source)" , "Give out, emit" , "Issue or spread out from a source" .)