Give an amount that's generous (8)
I believe the answer is:
handsome
'generous' is the definition.
(similar in meaning)
'give an amount' is the wordplay.
'give' becomes 'hand' (synonyms).
'an amount' becomes 'some' ().
'hand'+'some'='HANDSOME'
'that's' is the link.
(Other definitions for handsome that I've seen before include "Nice-looking" , "Pleasing to see" , "Attractive in a strong, imposing way" , "Nomads he found to be good-looking" , "Attractive, liberal" .)