Clue: Bushes, perhaps, in dense strip in need of cultivation (10)
Answer: PRESIDENTS
Explanation: Definition: Bushes, perhaps
 **Anagram of**(… in need of cultivation) IN DENSE STRIP.
Defn: What, in this instance/perhaps, father and son, George H.W. Bush and George W. Bush of the USA, were.
(And you might say that "dense" and "in need of cultivation" might be an apt description for one of them.)