Tears from papa, squashed by stones (6)
I believe the answer is:
speeds
'tears' is the definition.
(tears along the road)
'papa squashed by stones' is the wordplay.
'papa' becomes 'p' (phonetic alphabet: alpha, bravo, charlie etc.).
'squashed by' indicates putting letters inside.
'stones' becomes 'seeds'.
'p' inserted into 'seeds' is 'SPEEDS'.
'from' is the link.
(Other definitions for speeds that I've seen before include "Rates of movement" , "Rates of acceleration" , "Moves very quickly" , "these may be in knots" , "Goes fast, maybe too fast" .)