Charge £0.01 per person to cross motorway (7)
I believe the answer is:
impeach
'charge' is the definition.
(impeachment means charging a public official)
'01 per person to cross motorway' is the wordplay.
'0i' becomes 'ip' (I can't explain this - if you can you should believe this answer much more).
'per person' becomes 'each' (eg 'one each' means 'one per person').
'to cross' indicates putting letters inside (some letters cross or go round others).
'motorway' becomes 'M' (as in motorway names - Mi, M4 etc).
'ip'+'each'='ipeach'
'ipeach' enclosing 'm' is 'IMPEACH'.
'ps0' is the link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for impeach that I've seen before include "Arraign, charge" , "Arraign - revile" , "Charge with treason, etc" , "Level a charge against -- pace him (anag)" , "Charge with a crime (against the state)" .)