Ego consumed, on reflection, by trifles: enough! (7)

I believe the answer is:

oneself

I'm a little stuck... Click here to teach me more about this clue!

'ego' is the definition.
(ego can mean one's sense of self)

'consumed on reflection by trifles enough' is the wordplay.
'ONESELF' is hidden backwards within the letters.
However, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for oneself that I've seen before include "Feels on (anag.)" , "Being by this is alone" , "Third person singular pronoun" , "Personal pronoun" , "personally" .)

I've seen this clue in The Telegraph.

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