Confidence in particular toy loses nothing (9)
I believe the answer is:
certainty
'confidence' is the definition.
(thesaurus)
'particular toy loses nothing' is the wordplay.
'particular' becomes 'certain' (I've seen this before).
'loses' indicates named letters should be taken away.
'nothing' becomes 'O' (looks like zero - 0).
'toy' with 'o' taken away is 'ty'.
'certain'+'ty'='CERTAINTY'
'in' is the link.
(Other definitions for certainty that I've seen before include "A definite fact" , "Banker" , "Cinch" , "State of being sure" , "Foregone conclusion" .)