Power generator (7)
'power generator' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for turbine that I've seen before include "Power generator" , "Power producer" , "Rotary energy converter" , "Source of power" , "Machine generating power" .)
'power generator' is the definition.
(I know that dynamo is a type of electric generator)
This is the entire clue.
(Other definitions for dynamo that I've seen before include "energetic individual" , "Generator of electricity (eg, on bicycle)" , "Source of electric current" , "Machine" , "Type of electrical generator" .)
(Other definitions for dam that I've seen before include "River blockage" , "Barrier to hold back water" , "Water barrier, quite mad" , "Female parent; obstruction" , "Flood barrier" .)