Longing for drought (6)
I believe the answer is:
thirst
I believe this is a double definition.
'longing' is the first definition.
(I've seen this before)
'drought' is the second definition.
(I've seen this before)
'for' is the link.
(Other definitions for thirst that I've seen before include "T-shirt (anag)" , "Strong desire for drink" , "Want of drink" , "Strong desire for something" , "Need for liquids" .)