Reportedly obstruct some countries (4)
I believe the answer is:
bloc
'reportedly obstruct some countries' is the definition.
I can't tell whether this defines the answer.
'reportedly obstruct' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'obstruct' becomes 'block' (synonyms).
'block' sounds like 'BLOC'.
Can you help me to learn more?
(Other definitions for bloc that I've seen before include "Group acting together" , "Group with a common policy" , "Combination of parties or countries" , "Allied country group" , "People cooperating" .)