To hinder from grasping power, I deem wrong (6)
I believe the answer is:
impede
'to hinder' is the definition.
('impede' can be a synonym of 'hinder')
'power i deem wrong' is the wordplay.
'power' becomes 'p'.
'wrong' indicates an anagram.
'p'+'i'+'deem'='pideem'
'pideem' anagrammed gives 'IMPEDE'.
'from grasping' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for impede that I've seen before include "Interfere with progress" , "Hamper" , "Hinder, be obstructive" , "Handicap" , "Hold back" .)