Feel nostalgic for what borders on midsummer madness (4)

I believe the answer is:

miss

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'feel' is the definition.
The definition and answer can be both related to thinking as well as being verbs in their base form.
Maybe you can see a link between them that I don't see?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for miss that I've seen before include "Girl or unmarried woman" , "One is as good as a mile" , "teacher's address" , "Feel the loss of - schoolgirl" , "Overlook - misfire - young lady" .)

I've seen this clue in the Irish Times.

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