Roaming app reaches Hare and Hounds (5,5)
I believe the answer is:
paper chase
'hare and hounds' is the definition.
(different terms for the same racing game)
'roaming app reaches' is the wordplay.
'roaming' indicates anagramming the letters.
'app'+'reaches'='appreaches'
'appreaches' anagrammed gives 'PAPER-CHASE'.
(Other definitions for paper chase that I've seen before include "Trail-following cross-country race" , "cross country run" , "Type of cross-country race" , "Cross-country race following trail" .)