Study many points (3)
I believe the answer is:
den
'study' is the definition.
(term for a study or office)
'many points' is the wordplay.
'many' becomes 'd'.
'points' becomes 'en' ().
'd'+'en'='DEN'
(Other definitions for den that I've seen before include "Wild animal's lair" , "Animal's home or gent's study" , "Animal shelter" , "Habitation of wild animals (3)" , "Animals' shelter" .)