Cask from the King's Head for example (3)
I believe the answer is:
keg
'cask' is the definition.
(I know that keg is a type of cask)
'king's head for example' is the wordplay.
'head' indicates taking the first letters.
'for example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
The first letter of 'kings' is 'k'.
'k'+'eg'='KEG'
'from the' acts as a link.
(Other definitions for keg that I've seen before include "Small cask or barrel" , "Sort of beer" , "What's found at King's Head" , "Barrel as for beer" , "Small beer cask" .)