Barbados, June 24 -- Hayley Matthews was once again the star as the West Indies broke a 12-year drought with a series-clinching six-wicket victory over South Africa in the third T20I at Cave Hill on Monday. Matthews scored a superb half-century to pace the West Indies' run chase as the Caribbean side chased down South Africa's total of 147/6 with nine deliveries remaining. It helped the West Indies register a 2-1 series triumph over the Proteas, which was the first time they had defeated South Africa in a bilateral T20I series since the start of 2013. Youngster Miane Smit (59 not out) hit her own half-century in a polished display earlier in the day to help South Africa post a decent total, but Matthews was in fine touch in reply as she hit...