Badly timed rent loss (9)
I believe the answer is:
detriment
'loss' is the definition.
(I've seen this before)
'badly timed rent' is the wordplay.
'badly' is an anagram indicator.
'timed'+'rent'='timedrent'
'timedrent' anagrammed gives 'DETRIMENT'.
(Other definitions for detriment that I've seen before include "State of being harmed or damaged" , "hurt" , "Harm, damage" , "Possible loss" , "Damage, loss" .)