lightup Become visibly cheerful, seeing broadcast plug hit Show sudden joy Get high, in a way Start to smoke Start to shine Start smoking Clue for the four longest answers in this puzzle Brighten, or a hint to each starred answer's vertical continuation Pay no heed to smoking rules Mild drink (seconds repeatedly declined) then start on fag Suddenly display joy Appear pleased to start smoking Look happy to get solution to clue over Begin to sparkle, as smoker might?