A good book, for instance, can be dear
I believe the answer is:
read
'a good book' is the definition.
'read' can be an answer for 'book' (I've seen this before). I'm not certain of the 'a good' bit.
'instance can be dear' is the wordplay.
'dear' anagrams to 'READ'.
But, I'm not clear how the anagram is indicated.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for read that I've seen before include "Comprehend written words" , "Study (subject at university)" , "Measure energy or fuel consumption" , "Interpret writing" , "examined" .)