Flush loo – handle occasionally stays down (have wiped) (6)

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

Alternate letters (occasionally stays = only some of the letters stay?) from L [o] O [h] A [n] D [l] E , then D [own] with OWN (have) removed (wiped). Flush = loaded = slang for wealthy.