US magazine circulation about constant for periods (10)
I believe the answer is:
timescales
'periods' is the definition.
I know nothing about this answer so I can't judge whether this works.
'us magazine circulation about constant' is the wordplay.
'us magazine' becomes 'time' (US weekly magazine).
'circulation' becomes 'sales' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'about' indicates putting letters inside.
'constant' becomes 'c' (common symbol in maths for an unknown constant).
'sales' enclosing 'c' is 'scales'.
'time'+'scales'='TIMESCALES'
'for' is the link.
Can you help me to learn more?
I've seen this clue in The Independent.
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