I gotta agree: CIGAR was my favourite to clue, too. If my ire wasn't obvious enough in the original clue, I've also update 5 Down... couldn't help myself!
Common incorrect pluralisation of a Danish children's toy made of interlocking multi-coloured bricks. Seriously, search for it. I don't care if I'm just giving you the answer here: the plural is LEGO -- not LEGOS!