New slide made GP study distribution in later life (6-3,6)
I believe the answer is:
middle-age spread
'distribution in later life' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'new slide made gp study' is the wordplay.
'new' indicates an anagram.
'study' becomes 'read' (synonyms).
'slide'+'made'+'gp'='slidemadegp'
'slidemadegp' anagrammed gives 'middleagesp'.
'middleagesp'+'read'='MIDDLE-AGE SPREAD'
Can you help me to learn more?
(Other definitions for middle-age spread that I've seen before include "Weight gain in later life" , "Pot" , "Weight problem for those growing older" .)