In truth, it checks progress? (5)
I believe the answer is:
hitch
'progress?' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'in truth it checks' is the wordplay.
'in' says the answer is hidden in the clue.
'HITCH' is hidden within 'truth it checks'.
Can you help me to learn more?
(Other definitions for hitch that I've seen before include "Snag, drawback" , "Pull up" , "Temporary problem" , "interruption" , "Unexpected problem" .)