Person damaging a London museum and rail terminus (6)
I believe the answer is:
vandal
'person' is the definition.
(vandal is a kind of person)
'museum and rail terminus' is the wordplay.
'museum' becomes 'V and A' (Victoria and Albert Museum).
'and' says to put letters next to each other.
'rail terminus' becomes 'l' (I am not sure about this - if you are sure you should believe this answer much more).
'vanda'+'l'='VANDAL'
'damaging a london' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for vandal that I've seen before include "One who wilfully defaces or destroys property" , "Ger. tribesman; one who damages property" , "Hoodlum" , "Wanton wrecker" , "One who maliciously causes damage" .)