Of single dimension, trendy king about (6)

I believe the answer is:

linear

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

'of single dimension trendy king about' is the definition.
I can't judge whether this definition defines the answer.

'trendy king about' is the wordplay.
'trendy' becomes 'in'.
'king' becomes 'lear' (King Lear).
'about' indicates putting letters inside.
'in' put inside 'lear' is 'LINEAR'.

Can you help me to learn more?

(Other definitions for linear that I've seen before include "(Of narrative) sequential" , "Nailer (anag.)" , "Long and narrow, of one dimension" , "following straight path" , "One-dimensional" .)

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app