Preserve former electric vehicle, topless car built outside LA (5,9)

'preserve' is the definition.

'former electric vehicle topless car built outside la' is the wordplay.
'former' becomes 'ex'.
'electric vehicle' becomes 'tram' (I've seen this before).
'topless' means to remove the first letter.
'built' becomes 'made' ('make' can be a synonym of 'build'**).
'outside' means one lot of letters goes inside another.
'car' with its first letter removed is 'ar'.
'made' going around 'la' is 'malade'.
'ex'+'tram'+'ar'+'malade'='EXTRA MARMALADE'