Foolish admirer filled with energy to become more romantic (8)

I believe the answer is:

dreamier

'more romantic' is the definition.
(I've seen this before)

'foolish admirer filled with energy' is the wordplay.
'foolish' indicates anagramming the letters.
'filled with' is an insertion indicator.
'energy' becomes 'e' (physics symbol as in E=mc2).
'admirer' with letters rearranged gives 'dreamir'.
'dreamir' placed around 'e' is 'DREAMIER'.

'to become' is the link.

(Another definition for dreamier that I've seen is " More romantic".)

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