Island, I gather, having many features (8)
I believe the answer is:
manifold
'having many features' is the definition.
(I've seen this before)
'island i gather' is the wordplay.
'island' becomes 'Man' (the Isle of Man is an example).
'i gather' becomes 'ifold' (I can't justify this - if you can you should believe this answer much more).
'man'+'ifold'='MANIFOLD'
Can you help me to learn more?
(Other definitions for manifold that I've seen before include "Diverse like engine part?" , "Multi-functional" , "car part?" , "having many features" , "Many and various" .)