Aeroplane, perhaps, caught offloading contents to accommodate airmen (5)
I believe the answer is:
craft
'aeroplane perhaps' is the definition.
(I know that airplane is a type of heavier-than-air craft)
'caught offloading contents to accommodate airmen' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'offloading contents' becomes 't' (I can't explain this - if you can you should give a lot more credence to this answer).
'to accommodate' means one lot of letters goes inside another.
'airmen' becomes 'RAF' (Royal Air Force).
'c'+'t'='ct'
'ct' enclosing 'raf' is 'CRAFT'.
Can you help me to learn more?
(Other definitions for craft that I've seen before include "boats" , "Cunning - ability" , "Cunning; boat, ship" , "Creative activity" , "practical skill" .)