Clue: Favourite leader's lost weight where some US VIPs have gained stones (9)
Answer: ARLINGTON
Explanation: Definition: where some US VIPs have gained stones
DARLING (favourite) less its "leader" + TON (weight); Arlingont National Cemetery, near Washington DC, is mainly for military personnel (not necessarily VIPs) killed in war, but presidents can also be buried there, as John F Kennedy was