tent pole
Concise Oxford English Dictionary © 2008 Oxford University Press:
tent pole
▶noun
- 1 a pole supporting a tent.
- 2 [as modifier] informal, chiefly US (of a film) expected to be very successful and therefore able to fund a range of related products or films: the studio will generate five tent-pole movies to support its other titles.
'tent pole' also found in these Oxford entries:

