Getting emotional - it's showing, just a bit (5)
I believe the answer is:
tinge
'just a bit' is the definition.
'getting emotional it's showing' is the wordplay.
'it's showing' indicates a hidden word.
'TINGE' is hidden within 'getting emotional'.
(Other definitions for tinge that I've seen before include "Smattering" , "A suspicion" , "Get in (anag)" , "A shade or a nuance" , "Touch (of colour?)" .)