Disastrous bin fire, put simply (2,5)
I believe the answer is:
in brief
'put simply' is the definition.
(described in a simple way)
'disastrous bin fire' is the wordplay.
'disastrous' indicates anagramming the letters.
'bin'+'fire'='binfire'
'binfire' is an anagram of 'IN BRIEF'.
(Other definitions for in brief that I've seen before include "Summing it all up, with just a few words" , "To sum up" , "To summarise or put succinctly" , "Taking just a few words" , "quickly" .)