The meta answer is BELGIUM (Hint: Find a 7-letter proper noun associated with chocolate). 8 Across answers had the capitol of a country as its first word. (The title "Capital Idea!" punned on that; different spelling, but sounds like the theme answer's gimmick.) You may then have wondered: Which countries are they capitols of, again? From top to bottom:
[HAMILTON]BEACH > Bermuda
[MOSCOW]MULEMUG > Russia
[LONDON]FOG > United Kingdom
[VICTORIA]PRINCIPAL > Seychelles
[STOCKHOLM]SYNDROME > Sweden
[CAIRO]TIME > Egypt
[TRIPOLI]POWDER > Libya
[DAMASCUS]STEEL > Syria
Speaking of "capital"--as in capital letter--the 1st capital letter in each theme answer, from top to bottom, spells BRUSSELS ... which is an 8-letter proper noun associated with sprouts, not a 7-letter proper noun associated with chocolate. But you know what is? Its corresponding country, BELGIUM, which satisfies the puzzle's hint.