Lock worker in bar with British monarch (6)
I believe the answer is:
barber
'lock worker' is the definition.
'barber' can be an answer for 'worker' (barber is a kind of worker). I'm not sure about the 'lock' bit.
'bar with british monarch' is the wordplay.
'with' means one lot of letters go next to another.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'monarch' becomes 'ER' (abbreviation for Elizabeth Regina, British Queen).
'bar'+'b'+'er'='BARBER'
'in' is the link.
Can you help me to learn more?
(Other definitions for barber that I've seen before include "Man's hairdresser - from Seville?" , "Men's haircutter, musically of Seville?" , "Traditional men's hairdresser" , "Hairdresser who cuts and shaves" , "Men's hairdresser, musically of Seville" .)