Cleverly hasn't fought since losing his world title to Sergey Kovalev in August, and the Welsh fighter's father and current trainer Vince has revealed that his son is contemplating a move to the former trainer of David Haye and George Groves.
Cleverly Snr is quoted by BBC Sport as saying: "He's trying things out with Adam Booth at the moment in London to see how that's working out so there's a couple of different things that's going on.
"We've been together since 11 years of age. Sometimes, there comes a time in life where you need to try different things, and Nathan has got to be taken out of his comfort zone."
The 26-year-old has withdrawn from his first bout at cruiserweight on three occasions due to injury.