Works hard to get good service at empty tearooms (6)
I believe the answer is:
Here is my best explanation:
'works hard' is the definition.
(I've seen this before)
'good service at empty tearooms' is the wordplay.
'good' becomes 'g' (abbreviation).
'service' becomes 'raf' (**).
'at' means one lot of letters go next to another.
'empty' means to remove the middle letters.
'tearooms' with its middle taken out is 'ts'.
'to get' is the link.