Left us blocked by our CID, bumbling, absurd (9)
I believe the answer is:
ludicrous
'absurd' is the definition.
(synonyms)
'left us blocked by our cid bumbling' is the wordplay.
'left' becomes 'l' (common abbreviation).
'blocked by' indicates putting letters inside (block can mean to plug a gap in something).
'bumbling' indicates an anagram.
'our'+'cid'='ourcid'
'ourcid' anagrammed gives 'dicrou'.
'us' enclosing 'dicrou' is 'udicrous'.
'l'+'udicrous'='LUDICROUS'
(Other definitions for ludicrous that I've seen before include "Risible" , "Nonsensical" , "Ridiculously foolish" , "Utterly laughable" , "Farcical" .)