A group of soldiers happy about mixed gin (10)
I believe the answer is:
contingent
'a group of soldiers happy about mixed gin' is the definition.
I can't judge whether this defines the answer.
'happy about mixed gin' is the wordplay.
'happy' becomes 'content' (associated in meaning).
'about' means one lot of letters goes inside another.
'mixed' is an anagram indicator.
'gin' with letters rearranged gives 'ing'.
'content' going around 'ing' is 'CONTINGENT'.
Can you help me to learn more?
(Other definitions for contingent that I've seen before include "not necessary" , "uncertain" , "group of people" , "party" , "Subject to chance" .)