Goodness knows how many men put out consuming drug (7)
I believe the answer is:
umpteen
'goodness knows how many' is the definition.
I can't judge whether this definition defines the answer.
'men put out consuming drug' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'consuming' is an insertion indicator.
'drug' becomes 'e' (E is another name for ecstasy).
'men'+'put'='menput'
'menput' is an anagram of 'umpten'.
'umpten' going around 'e' is 'UMPTEEN'.
Can you help me to learn more?
(Other definitions for umpteen that I've seen before include "Large but indefinite number" , "Plentiful" , "Uncountably many" , "An uncountable number" , "Great in number but unspecified" .)