Answer: minicab

AnswerCrossword Clue
MINICABTransport from Heathrow, perhaps
MINICABSmall conveyance
MINICABSmall taxi
MINICABSubcompact taxi
minicaba small taxicab (automobile for hire)
minicabA car that is used as a taxi but that must be ordered in advance because it is not licensed to pick up passengers who hail it in the street