Primarily worrisome animals spoiling picnic spreads (5)

I believe the answer is:
wasps
'primarily worrisome animals spoiling picnic spreads' is the definition.
I can't tell whether this defines the answer.
'primarily worrisome animals spoiling picnic spreads' is the wordplay.
'primarily' suggests taking the first letters.
The initial letters of 'worrisome animals spoiling picnic spreads' is 'WASPS'.
Can you help me to learn more?
(Other definitions for wasps that I've seen before include "Members of rugby team" , "Ones playing together" , "Striped stinging insects" , "Stinging hymenopterans" , "English Protestant stingers?" .)
