Ship loads drink that's brought back strength (5)
I believe the answer is:
asset
'strength' is the definition.
(I've seen this before)
'ship loads drink that's brought back' is the wordplay.
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'loads' becomes 'tea' (I can't justify this - if you can you should give a lot more credence to this answer).
'drink' indicates putting letters inside.
'that's brought back' says the letters should be written backwards.
'ss' inserted into 'tea' is 'tessa'.
'tessa' back-to-front is 'ASSET'.
Can you help me to learn more?
(Other definitions for asset that I've seen before include "good point" , "Plus point" , "A possession of some value" , "Advantage, strength" , "Anything of value" .)