Radical mechanism

[P0W3RL1FT3R]

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I'm a little confused as to what the radical intermediate is for this reaction.

It is ethylbenzene, I just drew the hydrogens in red.. If those are even the hydrogens I should be pushing that is

 

[aldol16]

The way it is drawn, the radical should go on the methyl carbon. But your mechanism is wrong in general. The benzylic site is more reactive and H atom abstraction will occur there rather than at the distal methyl.