Dash into fellowship's 'facility' (7)
I believe the answer is:
amenity
'facility' is the definition.
(I know that facility can be written as amenity)
'dash into fellowship's' is the wordplay.
'dash' becomes 'en' (I can't explain this - if you can you should give a lot more credence to this answer).
'into' means one lot of letters goes inside another.
'fellowship' becomes 'amity' (I've seen this before).
'en' put inside 'amity' is 'AMENITY'.
Can you help me to learn more?
(Other definitions for amenity that I've seen before include "Useful feature (of place/ building)" , "Feature that makes life pleasant or convenient" , "asset to the community" , "Item provided to make life easier" , "Anytime (anag.)" .)