See bishop in farewell that's endearing (7)
I believe the answer is:
lovable
'endearing' is the definition.
(similar in meaning)
'see bishop in farewell' is the wordplay.
'see' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'bishop' becomes 'B' (chess abbreviation).
'in' means one lot of letters goes inside another.
'farewell' becomes 'vale' (I've seen this before).
'b' going within 'vale' is 'vable'.
'lo'+'vable'='LOVABLE'
'that's' acts as a link.
(Other definitions for lovable that I've seen before include "Adorable" , "Easy to be fond of like 21 Down" , "Inspiring affection" , "Attracting affection" , "Delightful" .)