Choosy lad unhappy here, perhaps (3,6)
I believe the answer is:
day school
'here perhaps' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'choosy lad unhappy' is the wordplay.
'unhappy' is an anagram indicator.
'choosy'+'lad'='choosylad'
'choosylad' anagrammed gives 'DAY-SCHOOL'.
(Other definitions for day school that I've seen before include "place of learning" , "where there are no beds in a dorm" , "Seat of learning" .)