Verb-turned-noun (6)
I believe the answer is:
gerund
'verb-turned-noun' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gerund that I've seen before include "-ing word functioning as a noun" , "Verbal noun ending in 'ing'" , "Verb form functioning as a noun" , "Verb form used as a noun" , "Noun formed from a verb -- nudger (anag)" .)