Pleasant, but would I be up to it? (7)
I believe the answer is:
amiable
'pleasant' is the definition.
(I know that pleasant can be written as amiable)
'would i be up to it?' is the wordplay.
'would i' becomes 'ami' (I can't explain this - if you can you should believe this answer much more).
'be up to it?' becomes 'able' (up to it means able to do something).
'ami'+'able'='AMIABLE'
'but' acts as a link.
Can you help me to learn more?
(Other definitions for amiable that I've seen before include "Of sweet and friendly disposition" , "'Cordial, friendly (7)'" , "Good-humoured" , "Lovable, friendly" , "Charming" .)