
1) Royal Navy tradition 2) Traditional board game
Found on
https://www.crosswordclues.com/clue/uckers

Uckers is a two- or four-player board game traditionally played in the Royal Navy, Royal Marines, Royal Canadian Navy, Royal New Zealand Navy, Royal Australian Navy, Royal Australian Air Force (RAAF) and the Royal Air Force (RAF). It is believed to originate in the 18th/19th centuries from the Indian game Pachisi although the first reference to it...
Found on
http://en.wikipedia.org/wiki/Uckers
[Naval Acronyms and Slang] A game loosely based on ludo (RN)
Found on
http://www.encyclo.co.uk/local/21733
No exact match found.