Top up, pre fifty-mile trips here? (6,4)

I believe the answer is:

petrol pump

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'here?' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'top up pre fifty-mile trips' is the wordplay.
'fifty' becomes 'l' (Roman numeral).
'mile' becomes 'm' (common abbreviation).
'trips' is an anagram indicator.
'top'+'up'+'pre'+'l'+'m'='topupprelm'
'topupprelm' anagrammed gives 'PETROL PUMP'.

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(Other definitions for petrol pump that I've seen before include "Forecourt installation for dispensing fuel" , "item in garage" , "Forecourt equipment" , "Machine dispensing motoring fuel" .)

I've seen this clue in The Times.

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