Display stand for similar types of things (7)

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

I can only dismiss this as a weak cryptic definition. It hardly counts as a double definition: a WHATNOT is a miscellaneous item, or a stand for displaying them, but the two meanings are intimately related, and the second part of the clue , ‘similar types of things’ would seem to require a plural. Not, I feel, Anto’s happiest clue.