Bishop with fewer to consecrate (5)
I believe the answer is:
bless
'consecrate' is the definition.
('bless' can be a synonym of 'consecrate')
'bishop with fewer' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'with' says to put letters next to each other.
'fewer' becomes 'less' ('less' is associated in meaning with 'fewer').
'b'+'less'='BLESS'
'to' is the link.
(Other definitions for bless that I've seen before include "Order of service" , "Consecrate; be thankful for" , "Approve of" , "Give benediction" , "Praise - consecrate" .)