Bloomers due to being a bit lazy, alas, out East (7)
I believe the answer is:
azaleas
'bloomers due to being a bit' is the definition.
I can't tell whether this defines the answer.
'lazy alas out east' is the wordplay.
'lazy' becomes 'az' (I can't explain this - if you can you should give a lot more credence to this answer).
'out' means one lot of letters goes inside another.
'east' becomes 'e' (synonyms).
'alas' going around 'e' is 'aleas'.
'az'+'aleas'='AZALEAS'
Can you help me to learn more?
(Other definitions for azaleas that I've seen before include "Smaller rhododendrons" , "Flowering shrubs" .)