There may be books in this small, fancy chalet (7)
I believe the answer is:
satchel
'there may be books in this' is the definition.
The definition suggests a singular noun which matches the answer.
'small fancy chalet' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'fancy' indicates anagramming the letters.
'chalet' anagrammed gives 'atchel'.
's'+'atchel'='SATCHEL'
Can you help me to learn more?
(Other definitions for satchel that I've seen before include "Bag with a flap and strap" , "Carrier for school books" , "Shoulder bag as for schoolbooks" , "Schoolchild's carrier" , "Text mark for an insertion" .)