Lurch inside restraining ragamuffins (7)
I believe the answer is:
urchins
'ragamuffins' is the definition.
(both can mean children in ragged clothing)
'lurch inside restraining' is the wordplay.
'restraining' indicates a hidden word (the answer is held or restrained by the clue).
'URCHINS' is hidden in the letters of 'lurch inside'.
(Other definitions for urchins that I've seen before include "Mischievous or ragged children, like sea creatures" , "Poorly-dressed children" , "Poor, often mischievous city children" , "Spiny marine invertebrates" , "Grubby young boys" .)