Is Ruth's son one sunk in depression, being like Adam? (11)
I believe the answer is:
disobedient
'like adam?' is the definition.
(Adam and Eve disobeyed God)
'is ruth's son one sunk in depression' is the wordplay.
'ruth's son' becomes 'Obed' (biblical figure).
'one' becomes 'i' (Roman numeral).
'sunk in' means one lot of letters goes inside another.
'depression' becomes 'dent' (synonyms).
'is'+'obed'+'i'='isobedi'
'isobedi' inserted into 'dent' is 'DISOBEDIENT'.
'being' is the link.
(Other definitions for disobedient that I've seen before include "Ignoring instructions" , "Going against instructions" , "Naughty" , "Rebellious" .)