Sporting event blasted target area (7)
I believe the answer is:
regatta
'sporting event' is the definition.
(I've seen this before)
'blasted target area' is the wordplay.
'blasted' indicates anagramming the letters.
'area' becomes 'a' (maths abbreviation).
'target' is an anagram of 'regatt'.
'regatt'+'a'='REGATTA'
(Other definitions for regatta that I've seen before include "Boat meeting (at Henley, say)" , "Yachting gala" , "Boat racing event" , "Rowing, sailing, gala" , "Yachting or rowing event" .)