Bitter Conservative needs help all around (4)
I believe the answer is:
acid
'bitter' is the definition.
('acid' can be a synonym of 'bitter')
'conservative needs help all around' is the wordplay.
'conservative' becomes 'c' (abbreviation commonly used in UK politics).
'needs help' becomes 'aid' ('aid' can be a synonym of 'help'. I am not sure about the 'needs' bit.**).
'all around' indicates putting letters inside.
'c' inserted into 'aid' is 'ACID'.
Can you help me to learn more?
(Other definitions for acid that I've seen before include "Bitter; biting" , "Bitter substance" , "Corrosive liquid; drug" , "Sour (substance)" , "Battery fluid" .)