Twice one's charged one penny to stop unemployment benefit (6)
I believe the answer is:
dipole
'twice one's charged' is the definition.
I can't tell whether this defines the answer.
'one penny to stop unemployment benefit' is the wordplay.
'one' becomes 'i' (Roman numeral).
'penny' becomes 'p' (short for pence).
'to stop' is an insertion indicator (stop can mean to plug a hole in something).
'unemployment benefit' becomes 'dole' (dole can mean government benefits).
'i'+'p'='ip'
'ip' placed within 'dole' is 'DIPOLE'.
Can you help me to learn more?
(Other definitions for dipole that I've seen before include "Type of aerial" , "I loped between two equal and opposite electric charges" , "Directional TV or radio aerial" .)