Learned about weird boat wreck (8)
I believe the answer is:
sabotage
'wreck' is the definition.
(I've seen this before)
'learned about weird boat' is the wordplay.
'learned' becomes 'sage' (I've seen this before).
'about' is an insertion indicator.
'weird' indicates anagramming the letters.
'boat' anagrammed gives 'abot'.
'sage' placed around 'abot' is 'SABOTAGE'.
(Other definitions for sabotage that I've seen before include "Deliberate wrecking" , "spoil things" , "cripple" , "Deliberate damage (eg, in wartime)" , "Subvert" .)