Company spacecraft - it strains (8)
I believe the answer is:
colander
'it strains' is the definition.
(a colander might be used to strain a liquid)
'company spacecraft' is the wordplay.
'company' becomes 'co' (abbreviation).
'spacecraft' becomes 'lander' (eg a moon lander).
'co'+'lander'='COLANDER'
(Other definitions for colander that I've seen before include "Kitchen item" , "implement that's full of holes" , "Device for straining water from food" , "Straining pan" , "Bowl-shaped strainer" .)