Slayer of dragon gets gore all over the place (2,6)
I believe the answer is:
st george
'slayer of dragon' is the definition.
(St George slayed a dragon)
'gets gore all over the place' is the wordplay.
'all over the place' indicates anagramming the letters.
'gets'+'gore'='getsgore'
'getsgore' anagrammed gives 'ST GEORGE'.
(Other definitions for st george that I've seen before include "opponent of 1 across [DRAGON]" , "Dragon-slayer" , "This hero" , "Patron saint of England" , "PANTO (part title)" .)