Bighead with many flaws... (5)

I believe the answer is:

blots

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'flaws' is the definition.
Although both the answer and definition are verbs in their -s form, I don't understand how they can define each other.

'bighead with many' is the wordplay.
'bighead' becomes 'b' (head letter of 'big').
'with' means one lot of letters go next to another.
'many' becomes 'lots' (lots of something).
'b'+'lots'='BLOTS'

Can you help me to learn more?

(Another definition for blots that I've seen is " Stains, perhaps on copybook".)

I've seen this clue in The Daily Express.

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