1) Alphabet run 2) Letters between S and W 3) Letters on an 8 button 4) Letters seen near an 8 5) Telephone button Found on https://www.crosswordclues.com/clue/tuv
TÜV Rheinland Group (TUV Technical Inspection Association) is an international service company which documents the safety and quality of new and existing products, systems and services.
Found on http://www.mpoweruk.com/glossary.htm