Explain dodgy clue one time (9)
I believe the answer is:
elucidate
'explain' is the definition.
(elucidating is a kind of explaining)
'dodgy clue one time' is the wordplay.
'dodgy' indicates anagramming the letters.
'one' becomes 'i' (Roman numeral).
'time' becomes 'date' (date is a kind of time**).
'clue' is an anagram of 'eluc'.
'eluc'+'i'+'date'='ELUCIDATE'
(Other definitions for elucidate that I've seen before include "Throw light on a problem, make clear (9)" , "Shed light on, clarify" , "Shed light upon" , "Make clear and more comprehensible" , "Make clear, explain" .)