Get in boat that's wrecked (6)
I believe the answer is:
obtain
'get' is the definition.
(synonyms)
'in boat that's wrecked' is the wordplay.
'that's wrecked' indicates anagramming the letters.
'in'+'boat'='inboat'
'inboat' anagrammed gives 'OBTAIN'.
(Other definitions for obtain that I've seen before include "Acquire or procure" , "Hold good" , "Get, procure" , "Get or receive" , "'Get, acquire (6)'" .)