Vine growth (7)
(Other definitions for tendril that I've seen before include "Part of twining plant" , "Twisted lock of hair" , "shoot to gain support" , "Climbing plant's means of support" , "Gripping part of climbing plant" .)
(Other definitions for grape that I've seen before include "Vine fruit" , "Vine berry" , "Fruit from bunch" , "Green/black fruit" , "Small fruit; type of shot" .)