Tasty, fatty tart regularly full of beans (10)
I believe the answer is:
attractive
'tasty' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?
'fatty tart regularly full of beans' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'full of beans' becomes 'active' (I can't explain this - if you can you should believe this answer much more).
'fatty'+'tart'='fattytart'
The alternating letters of 'fattytart' are 'attr'.
'attr'+'active'='ATTRACTIVE'
Can you help me to learn more?
(Other definitions for attractive that I've seen before include "Pleasing to the eye" , "Delightful" , "Magnetic" , "Fetching; cute" , "drawing?" .)