Left fool a bloomer, say (4)
I believe the answer is:
loaf
'a bloomer say' is the definition.
The answer and definition can be both to do with fundamental existence as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
'left fool' is the wordplay.
'left' becomes 'l' (common abbreviation).
'fool' becomes 'oaf' (I've seen this in another clue).
'l'+'oaf'='LOAF'
Can you help me to learn more?
(Other definitions for loaf that I've seen before include "Mass of bread" , "` `Half a .... is better than no bread' '" , "Lounge about" , "brains" , "See 2" .)