Having taken the lead with an own goal, looked appreciative (5)
I believe the answer is:
ogled
'appreciative' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can occasionally mean the same thing.
'having taken the lead with an own goal looked' is the wordplay.
I cannot quite understand how this works, but
'taken' could be 'led' (to lead someone somewhere is to take them there) and 'led' is found within the answer.
'own goal' could be 'og' (football abbreviation) and 'og' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for ogled that I've seen before include "Stared at" , "Looked at lecherously" , "Eyed in a lascivious manner" , "Eyed lecherously" , "Eyed lustily" .)