Welsh Music Festival Held in the Brecon Beacons
Puzzle 3 of Sherlock Holmes Hard Pack
Question is: Welsh Music Festival Held in the Brecon Beacons
and the answer is: GREENMAN
Word Meaning:
GREEN MAN — (chiefly UK, Ireland) A small figure of a walking man illuminated in green on a traffic light at a pedestrian crossing, indicating that it is safe to cross the road.
Definitions from Wiktionary.