Relayed plan in tiers (7)
I believe the answer is:
layered
'in tiers' is the definition.
(I've seen this before)
'relayed plan' is the wordplay.
'plan' indicates an anagram (plan can mean organise).
'relayed' anagrammed gives 'LAYERED'.
(Other definitions for layered that I've seen before include "Arranged in strata" , "Like a particular hairstyle" , "Type of cake perhaps" , "Made of several sheets" , "Stratified" .)