The term 'TELLY NETWORK' can be broken down into two words, 'TELLY' and 'NETWORK'. The first word, 'TELLY', is a slang term for television. The second word, 'NETWORK', refers to a group of interconnected television stations or channels. The crossword solution for this term is 'Beeb', which is an abbreviation for the British Broadcasting Corporation (BBC). The BBC is a public service broadcaster in the United Kingdom that provides television, radio, and online services. It is one of the largest broadcasters in the world and is funded by the UK government.