Recorded an article in much depth, possibly (5)
I believe the answer is:
taped
'recorded' is the definition.
('tape' can be a synonym of 'record')
'an article in much depth possibly' is the wordplay.
'an article' becomes 'a' (the indefinite article in English).
'in' is an insertion indicator.
'much' means to remove the last letter (much but not all of the word).
'possibly' indicates an anagram.
'depth' with its last letter removed is 'dept'.
'dept' is an anagram of 'tped'.
'a' going inside 'tped' is 'TAPED'.
(Other definitions for taped that I've seen before include "recorded" , "On record; tied up" , "Bound" , "put on record" .)