Paper sellers show hesitation in some pitches (10)
I believe the answer is:
stationers
'paper sellers' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'hesitation in some pitches' is the wordplay.
'hesitation' becomes 'er' (sound made while hesitating - um, er).
'in' means one lot of letters goes inside another.
'some pitches' becomes 'stations' (I can't explain this - if you can you should believe this answer much more).
'er' put within 'stations' is 'STATIONERS'.
'show' acts as a link.
Can you help me to learn more?
(Another definition for stationers that I've seen is " paper shops".)