Spare bishop from inconvenience (5)
I believe the answer is:
other
'spare' is the definition.
(thesaurus)
'bishop from inconvenience' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'from' suggests deleting specific letters.
'inconvenience' becomes 'bother' ('bother' can be a synonym of 'inconvenience').
'bother' with 'b' taken out is 'OTHER'.
(Other definitions for other that I've seen before include "Different; alternate" , "Different, not the same one or this one" , "Different; additional" , "Very unusual" , "One may be significant" .)