Urge parking with children around (5)
I believe the answer is:
speed
'urge' is the definition.
(thesaurus)
'parking with children around' is the wordplay.
'parking with' becomes 'p' (abbreviation on road signs. I am not sure about the 'with' bit.).
'children' becomes 'seed' (I've seen this in other clues).
'around' is an insertion indicator.
'p' inserted into 'seed' is 'SPEED'.
Can you help me to learn more?
(Other definitions for speed that I've seen before include "Rapidity of movement" , "Velocity" , "'More haste, less . . . . .'" , "Rate of progress" , "Expedition" .)