Whiskey gets alien soaked (3)
I believe the answer is:
wet
'soaked' is the definition.
(I know that soaked can be written as wet)
'whiskey gets alien' is the wordplay.
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'gets' means one lot of letters go next to another.
'alien' becomes 'et' (extra terrestrial).
'w'+'et'='WET'
(Other definitions for wet that I've seen before include "Rainy; feeble person" , "Irresolute" , "Rainy (weather)" , "Moistened" , "Soaked with water" .)