Meet following first-class service (4)
I believe the answer is:
face
'meet' is the definition.
(facing is a kind of meeting)
'following first-class service' is the wordplay.
'following' becomes 'f' (used when citing page numbers etc).
'first-class service' becomes 'ace' (ace is a kind of service. I am not sure about the 'first-class' bit.).
'f'+'ace'='FACE'
Can you help me to learn more?
(Other definitions for face that I've seen before include "TV show" , "celebrity" , "'Cheeks, mouth, eyes etc (4)'" , "Cope with" , "well-known person" .)