The continual round of wage increases? (6)
I believe the answer is:
'the continual round' is the definition.
'spiral' can be an answer for 'round' (thesaurus). I am unsure of the 'the continual' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for spiral that I've seen before include "Sort of staircase (could be vicious?)" , "Like some staircases" , "In flight manoeuvre" , "Helical shape" , "Winding like the thread of a screw" .)