Tardily, woke Liberal goes on record, boring new voters (9)
I believe the answer is:
overslept
'tardily woke' is the definition.
(woke up late)
'liberal goes on record boring new voters' is the wordplay.
'liberal goes' becomes 'l' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other).
'record' becomes 'EP' (abbreviation for extended play record).
'boring' is an insertion indicator (some letters must 'bore' a hole into other letters).
'new' indicates anagramming the letters.
'l'+'ep'='lep'
'voters' is an anagram of 'overst'.
'lep' inserted within 'overst' is 'OVERSLEPT'.
(Other definitions for overslept that I've seen before include "Was late rising" , "Failed to rise on time" .)