Wrong to welcome people's suffering (7)
I believe the answer is:
torment
'suffering' is the definition.
(torment is a kind of suffering)
'wrong to welcome people's' is the wordplay.
'wrong' becomes 'tort' (legal term).
'to welcome' means one lot of letters goes inside another (in sense of 'inviting in').
'people' becomes 'men' (man is a kind of person).
'tort' placed around 'men' is 'TORMENT'.
(Other definitions for torment that I've seen before include "Agony of mind" , "Harass" , "Pester annoyingly" , "Punish" , "Pester or tease unmercifully" .)