Approaching a road in roughly two seconds (7)
I believe the answer is:
towards
'approaching' is the definition.
(I've seen this before)
'a road in roughly two seconds' is the wordplay.
'road' becomes 'rd' (abbreviation).
'in' indicates putting letters inside.
'roughly' is an anagram indicator.
'seconds' becomes 's'.
'a'+'rd'='ard'
'two'+'s'='twos'
'twos' with letters rearranged gives 'tows'.
'ard' placed within 'tows' is 'TOWARDS'.
(Other definitions for towards that I've seen before include "Regarding" , "Getting near" , "In the direction of" , "it's not coming away" , "approaching" .)