Val literally a wrecker! (6)
I believe the answer is:
vandal
'wrecker' is the definition.
(I've seen this before)
'val literally a' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for vandal that I've seen before include "He breaks things wantonly" , "Person causing destruction to property" , "Yahoo" , "Deliberate destroyer" , "One who maliciously causes damage" .)