For want of money all round, do less business (7)
I believe the answer is:
slacken
'all round do less business' is the definition.
I can't tell whether this defines the answer.
'for want of money' is the wordplay.
I cannot really see how this works, but
'want' could be 'lack' (synonyms) and 'lack' is present in the answer.
'money' could be 'sen' (I've seen this before) and 'sen' is found within the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for slacken that I've seen before include "Loosen -- become less busy" , "reduce tension" , "Ease off (work)" , "Make looser" , "Loosen, eg, a rope" .)