A single approval creates more consent! (4)
I believe the answer is:
ayes
'more consent' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'a single approval' is the wordplay.
'a single' becomes 'a'.
'approval' becomes 'yes' (I've seen this in another clue).
'a'+'yes'='AYES'
'creates' is the link.
Can you help me to learn more?
(Other definitions for ayes that I've seen before include "Those voting for the motion" , "Votes in favour" , "Positive votes" , "Voting assents" , "Votes of approval during 5 Down" .)