Transparent sheet for animation, one in suspect scale (7)
I believe the answer is:
celsius
'transparent' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'sheet for animation one in suspect scale' is the wordplay.
'sheet for animation' becomes 'cel' (sheet of celluloid used in animation).
'one' becomes 'i' (Roman numeral).
'in' indicates putting letters inside.
'suspect scale' becomes 'sus' (I can't justify this - if you can you should believe this answer much more).
'i' put inside 'sus' is 'sius'.
'cel'+'sius'='CELSIUS'
Can you help me to learn more?
(Other definitions for celsius that I've seen before include "Temperature scale named after Swedish astronomer" , "Freezing point is 0 degrees on this scale" , "alternative to F spelt out?" , "Scale of temperature devised by Swedish astronomer" , "Man responsible for scale" .)