Eruption (5)
'eruption' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for blast that I've seen before include "Severe reprimand; strong gust" , "Report" , "Severely criticise" , "Sudden, strong current of air" , "Noise of explosion" .)
'eruption' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for outburst that I've seen before include "Sudden disturbance" , "Angry words" , "Sudden emotional speech" , "Flare-up" , "show of anger" .)