Ring grazing land to get to grips with key publicity for drink (9)
I believe the answer is:
orangeade
'drink' is the definition.
(orangeade is a kind of drink)
'ring grazing land to get to grips with key publicity' is the wordplay.
'ring' becomes 'O' (letter resembling a ring).
'grazing land' becomes 'range' (I've seen this in another clue).
'to get to grips with' means one lot of letters goes inside another.
'key' becomes 'e' (a musical key).
'publicity' becomes 'ad' (short for advert).
'e'+'ad'='ead'
'range' going around 'ead' is 'rangeade'.
'o'+'rangeade'='ORANGEADE'
'for' is the link.
(Other definitions for orangeade that I've seen before include "Soft citrus drink" , "Fruity drink" , "Bubbly drink" , "Squash" , "Fruit drink" .)