Inactive name found in faltering trade? Yes (9)
I believe the answer is:
sedentary
'inactive' is the definition.
('sedentary' can be similar in meaning to 'inactive')
'name found in faltering trade? yes' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'found in' is an insertion indicator.
'faltering' is an anagram indicator.
'trade'+'yes'='tradeyes'
'tradeyes' anagrammed gives 'sedetary'.
'n' going into 'sedetary' is 'SEDENTARY'.
(Other definitions for sedentary that I've seen before include "Yes, red ant could be sitting" , "Tending to spend much time seated" , "Tending to stay seated" , "Sitting much and taking little exercise" , "describing many office jobs?" .)