Be obstructive, making many go wrong (4)
I believe the answer is:
clog
'wrong' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'be obstructive making many go' is the wordplay.
'be obstructive' becomes 'c' (I can't explain this - if you can you should believe this answer much more).
'making' indicates anagramming the letters.
'many' becomes 'l'.
'l'+'go'='lgo'
'lgo' is an anagram of 'log'.
'c'+'log'='CLOG'
Can you help me to learn more?
(Other definitions for clog that I've seen before include "Obstruct the wooden shoe" , "Congest" , "Become blocked with wooden-soled shoe" , "Footwear - hamper" , "Wooden shoe; choke up" .)