| NOTIONAL | Theoretical idea a learner concluded (8) |
| ABSTRACTION | Theoretical idea |
| ADDITIONAL | Extra part of arithmetic a learner concluded (10) |
| LYRICAL | Poem a learner concluded was songlike (7) |
| TONAL | According to key weight, a learner concluded (5) |
| ADJUDICATE | Give a ruling on idea a DJ cut out (10) |
| INNOVATES | Implements a fresh idea - a small alien returned after one new exploding star! (9) |
| CARRIEDAWAY | Lost all self-control with a wild idea: a war cry (7,4) |
| GOSSIPS | An abstract idea; a plan or intention; or, an invention that helps to market a product (7) |
| IMAGE | An idol, simile, statue or other likeness; a mental picture or idea; a photograph; or, one's persona (5) |
| STRAIGHTASADIE | This idea a star developed around end of filming to be totally honest (8,2,1,3) |
| FIGMENT | Contrived idea, a ... of your imagination |
| SECONDTHOUGHTS | Attendants conceal idea - a change of opinion |
| BRAINWAVE | Idea a straight-thinking person won't get? (9) |
| CONCEPTUALIZING | Conceiving an idea - a more intellectual version of imagining, perhaps (15) |
| ABSTRACTIONS | Mere ideas a bighead's put forward on orthopaedic procedures (12) |
| CINEMA | One of 5 down's ideas, a Roman pic for comp-osition (6,8) |
| ABSTRACT | Theoretical treatise written on a vacuous boss (8) |
| ACADEMIC | Of theoretical interest only, relating to a college education? (8) |
| EINSTEIN | Nineties' reform explained by theoretical physicist (8) |
