Detector of bishop grabbing Lovelace? (5)
I believe the answer is:
radar
'detector' is the definition.
(I've seen this before)
'bishop grabbing lovelace?' is the wordplay.
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'grabbing' means one lot of letters goes inside another.
'lovelace?' becomes 'ada' (computing pioneer Ada Lovelace).
'rr' going around 'ada' is 'RADAR'.
'of' acts as a link.
(Other definitions for radar that I've seen before include "Range and direction finding equipment" , "beams" , "Remote range sensor" , "Instrument to detect and track distant objects" , "Technique using beam" .)