Hapless fellow finally dines: terribly posh establishments with awful working conditions (10)
I believe the answer is:
sweatshops
'establishments with awful working conditions' is the definition.
I can't judge whether this definition defines the answer.
'hapless fellow finally dines terribly posh' is the wordplay.
'finally' suggests the final letters.
'dines' becomes 'eats' (I've seen this before).
'terribly' indicates an anagram.
The final letters of 'hapless fellow' are 'sw'.
'posh' anagrammed gives 'hops'.
'sw'+'eats'+'hops'='SWEATSHOPS'
Can you help me to learn more?
(Other definitions for sweatshops that I've seen before include "abused workers here" , "Factories with low pay" .)