See Dennis Amiss in poverty (9)
I believe the answer is:
neediness
'poverty' is the definition.
(thesaurus)
'see dennis amiss' is the wordplay.
'amiss' indicates an anagram.
'see'+'dennis'='seedennis'
'seedennis' with letters rearranged gives 'NEEDINESS'.
'in' is the link.
(Other definitions for neediness that I've seen before include "Want" , "Poverty" , "Insecurity" , "Wanting state" , "Destitution" .)