I'm in boat wrecked in dream (8)
I believe the answer is:
ambition
'dream' is the definition.
(synonyms)
'i'm in boat wrecked' is the wordplay.
'wrecked' indicates an anagram.
'im'+'in'+'boat'='iminboat'
'iminboat' is an anagram of 'AMBITION'.
'in' acts as a link.
(Other definitions for ambition that I've seen before include "hope for the future" , "Cherished aspiration" , "Aspiration, dream" , "Strong drive for success" , "Aspiration - goal" .)