Enigmatic Variations No.1330 – Pioneer by Shark

‘The grid illustrates a pioneering feat. The unclued entry must be left blank initially, and the grid completed by filling it with the name of the PIONEER. Solvers must also enter the same single letter into the two barred-off cells, highlight two points of interest in the grid, and connect them with a curved line (running through the term he
coined). Having disliked a term already in use, solvers must remove four letters from the grid (cryptically signifying the term itself). The final grid contains only real words; Chambers Dictionary (2016) is recommended, but does not contain the plural form at 32.”

I found this one tricky. There are a couple of &lit clues, and certain amount of tricky parsing.

The pioneer turns out to be LEE DE FOREST, who (amongst other things) made the first SHIP-to-SHORE transmissions by radiotelephone, those words being the “two points of interest”, which are to be connected by the words RADIO RADIO “with a curved line” resembling a waveform (a line that you’ll have to imagine in the grid below, since my skills don’t extend to putting one there).

We are to remove the word WIRE from the bottom-left of the grid, since de Forest disliked the term ‘wireless’… although doesn’t that introduce the term ‘wireless’ into the grid? I would have thought it would make more sense to add the letters WIRE to an incomplete grid. Either way, there was a lot to enjoy (for me the way the waveform was depicted being the most pleasing part).

Note
One definition of 30ac (the brand) isn’t in Chambers.

Notation

(xxx) = definition
[xxx] = (anagram/homophone/container/etc.) indicator
XXX* = anagram
< = reversal
HAMISH = ‘pioneer’ letter to be added
ANNULI = ‘wireless’ letter to be removed

Please post a comment if the explanations are not clear.