Once again fix a value re a vessel and the final vessel (8)
I believe the answer is:
reassess
'once again fix a value' is the definition.
I can't judge whether this defines the answer.
're a vessel and the final vessel' is the wordplay.
'vessel' becomes 'SS' (prefix in ship names eg SS Great Britain).
'and' says to put letters next to each other.
'final' indicates one should take the final letters.
'vessel' becomes 'SS' (prefix in ship names eg SS Great Britain).
The last letter of 'the' is 'e'.
're'+'a'+'ss'+'e'+'ss'='REASSESS'
Can you help me to learn more?
(Other definitions for reassess that I've seen before include "think again" , "Appraise again" , "Form new opinion" , "Estimate value once more" , "Make a further judgement" .)