Lost time moving on English parasite (9)
I believe the answer is:
mistletoe
'parasite' is the definition.
(mistletoe is a kind of parasite)
'lost time moving on english' is the wordplay.
'moving' indicates anagramming the letters.
'on' is an insertion indicator (as in clothing 'on' a person).
'english' becomes 'e' (abbreviation).
'lost'+'time'='losttime'
'losttime' with letters rearranged gives 'mistltoe'.
'mistltoe' placed around 'e' is 'MISTLETOE'.
(Other definitions for mistletoe that I've seen before include "Stole mite from the Christmas plant" , "Parasitic shrub for Christmas" , "Christmas berry" , "tempting a smack?" , "Christmas kissing plant" .)