Test probe? (7)
I believe the answer is:
examine
I believe this clue is a double definition.
'test' is the first definition.
('examine' can be a synonym of 'test')
'probe?' is the second definition.
('examine' can be a synonym of 'probe')
(Other definitions for examine that I've seen before include "Analyse" , "Subject to scrutiny" , "Inspect, peruse closely" , "Inspect carefully" , "Inspect , test" .)