One Direction to institute legal proceedings against kids (5)
I believe the answer is:
issue
'kids' is the definition.
(legal term for a person's children)
'one direction to institute legal proceedings against' is the wordplay.
'one' becomes 'i' (Roman numeral).
'direction' becomes 's' (S is an example).
'to institute legal proceedings' becomes 'sue' (I've seen this before).
'against' is a charade indicator (letters next to each other).
'i'+'s'+'sue'='ISSUE'
(Other definitions for issue that I've seen before include "Emerge" , "important point" , "Subject to discuss" , "Supply" , "Distribute for sale/use" .)