Ship loads drink that's raised in strength (5)
I believe the answer is:
asset
'strength' is the definition.
(I've seen this before)
'ship loads drink that's raised' is the wordplay.
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'loads' is an insertion indicator (some letters are loaded into others).
'drink' becomes 'tea' (tea is a drink).
'that's raised' says the letters should be written backwards (going up in a down clue).
'ss' put within 'tea' is 'tessa'.
'tessa' reversed gives 'ASSET'.
'in' acts as a link.
(Other definitions for asset that I've seen before include "Seats (anag.)" , "Part of motor vehicle wheel" , "Something well worth having" , "good point" , "Useful or valuable quality or possession" .)