Bad fire at development (8)
I believe the answer is:
offshoot
'development' is the definition.
(thesaurus)
'bad fire' is the wordplay.
'bad' becomes 'off' (I've seen this before).
'fire' becomes 'shoot' (shooting is a kind of firing).
'off'+'shoot'='OFFSHOOT'
'at' is the link.
(Other definitions for offshoot that I've seen before include "Branch, derivative" , "Business subdivision, say" , "Derivative; scion" , "Something developing from another" , "Subsidiary product or branch" .)