In case, detain our mob who go on the spree (7)
I believe the answer is:
carouse
'the spree' is the definition.
(thesaurus)
'in case detain our mob who go' is the wordplay.
I cannot really see how this works, but
an anagram of 'our' is 'rou' which is located in the answer.
The remaining letters 'case' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'on' is the link.
Can you help me to learn more?
(Other definitions for carouse that I've seen before include "Celebrate noisily" , "Engage in boisterous, drunken merry-making" , "Take a course to party wildly" , "Party noisily" , "booze" .)