Corset tight for hired companion (6)
I believe the answer is:
escort
'hired companion' is the definition.
'escort' can be an answer for 'companion' (escort is a kind of companion). I am unsure of the 'hired' bit.
'corset tight' is the wordplay.
'tight' is an anagram indicator (tight can mean drunk).
'corset' with letters rearranged gives 'ESCORT'.
'for' is the link.
Can you help me to learn more?
(Other definitions for escort that I've seen before include "'Accompany, perhaps protectively (6)'" , "Accompany - Ford model" , "Companion, perhaps for protection" , "Go with (someone)" , "Business providing companions for an evening out" .)