Committed (5)
(Other definitions for chose that I've seen before include "item from Paris" , "Picked" , "Determined" , "article from Paris" , "preferred" .)
'committed' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for dedicated that I've seen before include "Hard working" , "Consecrated - single-minded" , "Determined" , "Devoted to a particular cause or purpose" , "Committed" .)
'committed' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for zealous that I've seen before include "Very devoted to a cause" , "Dedicated" , "Intensely enthusiastic" , "Militant" , "Use Zola (anag.)" .)
(Another definition for in deep that I've seen is " very involved".)