Charlie got older, being so confined (5)
I believe the answer is:
caged
'so confined' is the definition.
(confined in a cage)
'charlie got older' is the wordplay.
'charlie' becomes 'C' (phonetic alphabet).
'got older' becomes 'aged' ('age' can be a synonym of 'get older').
'c'+'aged'='CAGED'
'being' acts as a link.
(Other definitions for caged that I've seen before include "In a zoo?" , "in prison" , "Cooped up" , "Confined behind bars" , "Shut up" .)