Isn't over-generous with the work allotments (6)
I believe the answer is:
stints
'work allotments' is the definition.
The answer and definition can be both acts as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'isn't over-generous with the' is the wordplay.
'over' is an anagram indicator.
'generous' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' means one lot of letters goes inside another.
'the' becomes 't' (the is pronounced as a 't' sound in some dialects).
'isnt' is an anagram of 'stin'.
'stin'+'s'='stins'
'stins' placed around 't' is 'STINTS'.
Can you help me to learn more?
(Other definitions for stints that I've seen before include "Fixed amounts of work" , "Allots sparingly" , "Stretches" , "Unbroken periods of work" , "Is niggardly, restricts to a small allowance" .)