Hurry, having let out large vehicle in front (6)
I believe the answer is:
bustle
'hurry' is the definition.
(thesaurus)
'let out large vehicle in front' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'large vehicle' becomes 'bus' (I've seen this before).
'in front' says to put letters next to each other.
'let' with letters rearranged gives 'tle'.
'tle' after 'bus' is 'BUSTLE'.
'having' acts as a link.
(Other definitions for bustle that I've seen before include "Hurry, scramble" , "Sublet (anag)" , "Hustle and fuss" , "Victorian fashion" , "A show of hurrying, or old skirt back padding" .)