The most common and most likely answer to this crossword clue is the 6 letter word SCATHE
I've seen this crossword clue in The Daily Telegraph
S
C
A
T
H
E
More clues leading to the result SCATHE
- Go away — explosive will bring blast!
- Female nursing pet once hurt
- Savage queen maybe featured in women’s magazine
- Carpet in Chartres Cathedral
- She takes in pet that’s hurt
- Injure head in smacking roughly against article
- Blast from explosive — get away before that!
- Harm that comes from the woman embracing tiger?
- Damage agricultural tool scrubbing yard for head of abbey
- Injure tax-man
Buddy explains!

The straight part
We know that "Blast" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case blast = scathe.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SCATHE mean?
SCATHE noun- Harm; damage; injury; hurt; misfortune; waste.
- To injure or harm.
- To blast; scorch; wither.