Make a virtue of love (9)
I believe the answer is:
favourite
'love' is the definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Maybe there's a link between them I don't understand?
'make a virtue of' is the wordplay.
'make' indicates an anagram.
'a'+'virtue'+'of'='avirtueof'
'avirtueof' is an anagram of 'FAVOURITE'.
Can you help me to learn more?
(Other definitions for favourite that I've seen before include "competitor thought likely to win" , "Specially dear person - likely winner" , "Sir Walter Raleigh was one" , "Beloved pet" , "royal confidant" .)