I think it would be stupid for the Kings to do, they should trade Spence for a middle-6 winger instead and just promote Clarke. But let's look at the reality:
1. The trade market is absolutely bonkers right now, with a worse winger than Rakell in Bjorkstrand just getting traded for effectively a 1st and 2nd.
2. The Kings seem to have soured on Clarke and are regularly healthy scratching him and playing Burroughs over him. They also have an obvious need for a right handed scoring winger and are allegedly interested in Rakell.
3. Rob Blake's track record for trades as GM is terrible, with him making a "Clarke for Rakell" type of deal already with trading Faber and a 1st for Fiala a few years ago.
4. Gavrikov is talking with the Kings about an extension, so their RD group is going to be locked up as Gavrikov, Doughty and Spence going forward (assuming they don't move Gavrikov to LD).
Kings fans should hate it because trading a 22 year old recent top-10 pick for a 31 year old top-6 winger having a career year is stupid. But it's completely within the realm of possibility for the reasons I mentioned above. if it's not Clarke, it's probably Greentree and a high pick.