Collins Chinese Dictionary Plus (3rd edition), 2011:
立足 lìzú 动
1
(=站得住脚) be established
- 在海外立足对(對)她来(來)说(說)不容易。 Zài hǎiwài lìzú duì tā lái shuō bù róngyì. It wasn't easy for her to establish herself overseas.
2
(=处于某立场) be based in