Vortex that inspired Dyson hoovers? (4)
I believe the answer is:
eddy
'vortex' is the definition.
(I've seen this before)
'inspired dyson hoovers?' is the wordplay.
'EDDY' is hidden within the letters.
But, I'm uncertain how the hidden word is indicated.
'that' is the link.
Can you help me to learn more?
(Other definitions for eddy that I've seen before include "Circular movement of air" , "Ripple" , "(Of fluid) circle round" , "Twist" , "Swirl, whirl" .)