Elf, say, crashing without risk (6)
I believe the answer is:
safely
'without risk' is the definition.
(I've seen this in another clue)
'elf say crashing' is the wordplay.
'crashing' is an anagram indicator.
'elf'+'say'='elfsay'
'elfsay' anagrammed gives 'SAFELY'.
(Other definitions for safely that I've seen before include "Without danger" , "In a risk-free manner" , "In a manner not exposed to danger" , "In a secure manner" .)