Ramsey, perhaps, supporting hotel partially (4)
I believe the answer is:
half
'partially' is the definition.
Both the definition and answer are adverbs. Perhaps there's a link between them I don't understand?
'ramsey perhaps supporting hotel' is the wordplay.
'ramsey perhaps' becomes 'alf' (I can't explain this - if you can you should give a lot more credence to this answer).
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'alf' after 'h' is 'HALF'.
Can you help me to learn more?
(Other definitions for half that I've seen before include "Measure of beer" , "proportion" , "Two of these to the pint" , "shared round" , "Portion of bread (better than none?)" .)