IT firm investing in odd bits of some TV series? (6)
I believe the answer is:
sitcom
'tv series?' is the definition.
(I've seen this before)
'it firm investing in odd bits of some' is the wordplay.
'firm' becomes 'co' (a firm is a company).
'investing in' indicates putting letters inside.
'odd bits of' indicates alternate letters.
The alternate letters of 'some' are 'sm'.
'it'+'co'='itco'
'itco' going inside 'sm' is 'SITCOM'.
(Other definitions for sitcom that I've seen before include "Humorous TV programme" , "Fresh Meat, for example" , "Shortened form of situation comedy" , "Amusing TV series (abbr.)" , "'Humorous drama based on situations, in short (6)'" .)