Controversial test, one welcomed by Apple consumer (7)
I believe the answer is:
emotive
'controversial' is the definition.
(I've seen this before)
'test one welcomed by apple consumer' is the wordplay.
'test' becomes 'MOT' (as in an MOT test for a vehicle).
'one' becomes 'i' (Roman numeral).
'welcomed by' indicates putting letters inside (letters welcomed inside).
'apple consumer' becomes 'eve' (I've seen this in another clue).
'mot'+'i'='moti'
'moti' going into 'eve' is 'EMOTIVE'.
(Other definitions for emotive that I've seen before include "able to get going" , "arousing passion" , "ignoring rationality?" , "Arousing great feeling" , "Sensitive - controversial" .)