First person is to meet people on empty stage, which should be huge (7)
I believe the answer is:
immense
'be huge' is the definition.
(synonyms)
'first person is to meet people on empty stage' is the wordplay.
'first person' becomes 'im' (I can't explain this - if you can you should give a lot more credence to this answer).
'is to meet' says to put letters next to each other.
'people' becomes 'men' (men are people).
'on' says to put letters next to each other.
'empty' means to remove the middle letters.
'stage' with its centre removed is 'se'.
'im'+'men'+'se'='IMMENSE'
'which should' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for immense that I've seen before include "Unusually large or great" , "Massive" , "Unctuously ingratiating" , "Very good" , "Mammoth" .)