Prow of boat to survive storm (5)
I believe the answer is:
blast
'storm' is the definition.
(thesaurus)
'prow of boat to survive' is the wordplay.
'prow of' indicates taking the first letters.
'to survive' becomes 'last' (synonyms).
The initial letter of 'boat' is 'b'.
'b'+'last'='BLAST'
(Other definitions for blast that I've seen before include "Great time: explosion" , "Blow up with explosives" , "Damn - explosion" , "Loud horn sound" , "Explosion - mild oath" .)