Welsh keep children in the cellar as arranged (7,6)
I believe the answer is:
harlech castle
'welsh keep' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'children in the cellar as arranged' is the wordplay.
'children' becomes 'ch' (genealogical abbreviation).
'in' indicates putting letters inside.
'arranged' indicates an anagram (letters rearranged).
'the'+'cellar'+'as'='thecellaras'
'thecellaras' with letters rearranged gives 'harlecastle'.
'ch' put within 'harlecastle' is 'HARLECH CASTLE'.
Can you help me to learn more?
(Another definition for harlech castle that I've seen is " ruined fortress".)