Brown in Yalta now (3)
I believe the answer is:
tan
'brown' is the definition.
(tan is a kind of brown)
'in yalta now' is the wordplay.
'in' indicates a hidden word.
'TAN' is hidden in the letters of 'yalta now'.
(Other definitions for tan that I've seen before include "Brown colour acquired from sun" , "Acquire a sunburn" , "Make hide into leather - nicely brown" , "Lie in sun" , "Get the effect of the sun." .)