No planner when busy gets worked up -- or so they say (8,7)
I believe the answer is:
personal pronoun
'they say' is the definition.
(I know that gender-neutral pronoun is a type of third-person pronoun)
'no planner when busy gets worked up or' is the wordplay.
I cannot quite see how this works, but
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is present in the answer.
'when' could be 'on' (I've seen this in other clues) and 'on' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'so' is the link.
Can you help me to learn more?
(Other definitions for personal pronoun that I've seen before include "We, say" , "us, perhaps" , "Maybe we" .)