Stray slow seen heading for recreation ground (9)
I believe the answer is:
ownerless
'stray' is the definition.
(I've seen this in another clue)
'slow seen heading for recreation ground' is the wordplay.
'heading for' says to take the initial letters.
'ground' indicates anagramming the letters ('grind' the letters into a new form).
The first letter of 'recreation' is 'r'.
'slow'+'seen'+'r'='slowseenr'
'slowseenr' anagrammed gives 'OWNERLESS'.
(Other definitions for ownerless that I've seen before include "common, perhaps" , "Not possessed by anyone" .)