Service pack's a bit awkward during Mass (6)
I believe the answer is:
kitbag
'service pack's' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'a bit awkward during mass' is the wordplay.
'awkward' indicates anagramming the letters.
'during' means one lot of letters goes inside another.
'mass' becomes 'kg' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'bit'='abit'
'abit' with letters rearranged gives 'itba'.
'itba' put within 'kg' is 'KITBAG'.
Can you help me to learn more?
(Other definitions for kitbag that I've seen before include "Cylindrical canvas holder for soldiers' clothes" , "Serviceman's canvas pack" , "knapsack" .)