Book dealers asked out to dance in Madrid (6)
I believe the answer is:
bolero
'madrid' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'book dealers asked out to dance' is the wordplay.
'out' is a deletion indicator.
'to dance' indicates an anagram (letters must dance around).
'book'+'dealers'='bookdealers'
'bookdealers' with 'asked' taken out is 'booler'.
'booler' with letters rearranged gives 'BOLERO'.
'in' is the link.
Can you help me to learn more?
(Other definitions for bolero that I've seen before include "Spanish dance in triple time" , "Dance (by Ravel?)" , "Short open jacket - Ravel composition" , "Kind of jacket or dramatic music by Ravel" , "Arrange to rob Leo during the dance" .)