Unhappy over broadcaster’s description of innovative thinking? (4-3)
I believe the answer is:
blue-sky
'description of innovative thinking?' is the definition.
The definition suggests an adjective which matches the answer.
'unhappy over broadcaster's' is the wordplay.
'unhappy' becomes 'blue' (blue can mean sad or miserable).
'over' means one lot of letters go next to another (in a down clue, some letters go over others).
'broadcaster' becomes 'sky' (Sky is a television company).
'blue'+'sky'='BLUE-SKY'
Can you help me to learn more?
(Other definitions for blue-sky that I've seen before include "Creative or visionary, without immediate value" , "Impractical (thinking)" , "(Of ideas) unconstrained by traditional limits" .)