tie–in

tie–in /ˈtaɪˌɪn/ noun
plural tie–ins
tie–in
/ˈtaɪˌɪn/
noun
plural tie–ins
Britannica Dictionary definition of TIE–IN
[count]
: a product (such as a toy) that is connected with a movie, television show, etc. — see also tie in at 1tie