One sees drink outside cargo area (8)
I believe the answer is:
beholder
'one sees' is the definition.
(I've seen this before)
'drink outside cargo area' is the wordplay.
'drink' becomes 'beer' (beer is a kind of drink).
'outside' indicates putting letters inside.
'cargo area' becomes 'hold' (synonyms).
'beer' placed around 'hold' is 'BEHOLDER'.
(Other definitions for beholder that I've seen before include "One who observes" , "Onlooker" , "Some looker" , "One sees" , "Beauty is said to be in this eye" .)