Means to declare times (8)
I believe the answer is:
averages
'means' is the definition.
(mean is a type of average)
'declare times' is the wordplay.
'declare' becomes 'aver' (averring is a kind of declaring).
'times' becomes 'ages' (age is a kind of time).
'aver'+'ages'='AVERAGES'
'to' is the link.
(Other definitions for averages that I've seen before include "Means" , "Data included in cricket statistics" , "Evens out to" , "Middle values" , "estimations of mean" .)