At times oddly lacking colour, like a wedding cake? (6)
I believe the answer is:
tiered
'like a wedding cake?' is the definition.
(I've seen this before)
'at times oddly lacking colour' is the wordplay.
'oddly lacking' indicates alternate letters (letters in odd-numbered positions removed).
'colour' becomes 'red' (red is a kind of colour).
'at'+'times'='attimes'
The alternating letters of 'attimes' are 'tie'.
'tie'+'red'='TIERED'
(Other definitions for tiered that I've seen before include "Cunstructed in layers" , "Set out in layers like wedding cake" , "Arranged in rows" , "Ranked" , "In ranks" .)