Generosity of types accepting needs intermittently (8)
I believe the answer is:
Here is my best explanation:
'generosity' is the definition.
'types accepting needs intermittently' is the subsidiary indication.
'types' becomes 'kinds' (I've seen this before).
'accepting' is an insertion indicator.
'intermittently' means one should take alternating letters.
The alternate letters of 'needs' are 'nes'.
'kinds' enclosing 'nes' is 'kindness'.
'of' is the link.
(Other definitions for kindness that I've seen before include "Consideration, warm-heartedness", "Goodwill", "Warmheartedness, consideration", "Compassion", "charity", "Warmheartedness, tenderness", "Benevolence", "Good deed", "Generosity towards those less fortunate" and "benevolence".)