Dicky bird let fluid escape? Let fluid escape! (8)

I believe the answer is:

dribbled

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'fluid escape? let fluid escape' is the definition.
I can't tell whether this defines the answer.

'dicky bird let' is the wordplay.
'dicky' indicates anagramming the letters (dicky can mean ill or non-functioning).
'let' becomes 'bled' (I can't explain this - if you can you should believe this answer much more).
'bird' is an anagram of 'drib'.
'drib'+'bled'='DRIBBLED'

Can you help me to learn more?

(Another definition for dribbled that I've seen is " Drooled".)

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