I had to follow many round, showing little emotion (6)
I believe the answer is:
stolid
'showing little emotion' is the definition.
(I've seen this before)
'i had to follow many round' is the wordplay.
'i had' becomes 'id' (I'd).
'to follow' is a charade indicator (letters next to each other).
'many' becomes 'lots' (I've seen this before).
'round' shows that the letters should be reversed in order.
'lots' reversed gives 'stol'.
'id' put after 'stol' is 'STOLID'.
(Other definitions for stolid that I've seen before include "Impassive or apathetic" , "Emotionally insensitive" , "Hard to excite" , "displaying little emotion" , "Impassive, unemotional" .)