Crossword Genius

Inspect radio picking up ranges of frequencies (7)

Ross

I believe the answer is:

spectra

'ranges of frequencies' is the definition.
(plural of 'spectrum')

'inspect radio picking up' is the wordplay.
'picking up' indicates a hidden word (the clue holds the solution).
'SPECTRA' is hidden in the letters of 'inspect radio'.

(Other definitions for spectra that I've seen before include "Bands of refracted colour" , "Carpets (anag.)" , "After-images" , "Whole ranges" , "Ranges of light wavelengths" .)

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