Many thousands of moves taking ages (1,5,2,7)
I believe the answer is:
a month of sundays
'ages' is the definition.
(I've seen this in another clue)
'many thousands of moves' is the wordplay.
'moves' indicates an anagram.
'many'+'thousands'+'of'='manythousandsof'
'manythousandsof' anagrammed gives 'A MONTH OF SUNDAYS'.
'taking' is the link.
(Other definitions for a month of sundays that I've seen before include "for ages" , "A bit of a stretch" , "a long time" , "lots of services?" .)