Hill workers with temperature, suffering (7)
I believe the answer is:
torment
'suffering' is the definition.
(torment is a kind of suffering)
'hill workers with temperature' is the wordplay.
'hill' becomes 'tor' (tor is a kind of hill).
'workers' becomes 'men' (man is a kind of worker).
'with' says to put letters next to each other.
'temperature' becomes 't' (abbreviation).
'tor'+'men'+'t'='TORMENT'
(Other definitions for torment that I've seen before include "Severe pain" , "Inflict pain on - pester" , "Great suffering" , "Cause mental distress" , "Persecute" .)