Clegg's full text is on his site here. The exact words he used were "a vote for a party that probably won’t win a single MP is a wasted vote", which is rather different to saying that a vote for Labour/Lib Dem/Conservative/delete to suit in x constituency is a wasted vote (and under FPTP he'd be right everywhere except Brighton and possibly Lewisham).

FWIW I'm not a huge Euro-enthusiast myself, as beingjdc knows, though I have no time for Little Englanders. As for asteroid defence plans, I'd cheerfully send Lembit on a fact-finding mission to the asteroid belt in order to stop him from embarrassing the party further.