Hybrid car struggling keeping that man Elon at the top (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Anagram (struggling) of CAR , containing (keeping) HIM (that man) + first (top) letter of E [lon]. (Who of course runs a company making electric vehicles, not hybrids.) Chimera = a mythological creature combining parts of various different animals; or a single organism composed of two separate sets of cells, for example by the fusion of two embryos.