Getaway speed leaves cop floundering in East London? (6,8)
I believe the answer is:
escape velocity
'getaway speed' is the definition.
'escape velocity' can be an answer for 'speed' (escape velocity is a kind of speed). I am unsure of the 'getaway' bit.
'leaves cop floundering in east london?' is the wordplay.
'floundering' indicates an anagram (letters flounder or move around).
'in' means one lot of letters goes inside another.
'east' becomes 'e' (abbreviation).
'london?' becomes 'city' (london is a kind of city).
'leaves'+'cop'='leavescop'
'leavescop' anagrammed gives 'scapevelo'.
'e'+'city'='ecity'
'scapevelo' placed into 'ecity' is 'ESCAPE VELOCITY'.
Can you help me to learn more?
(Another definition for escape velocity that I've seen is " Speed needed to beat earth's gravity".)