Translation of "struka" into English

Međutim, to ne znači da je struka ljekarnika definirana.

This does not mean, however, that the profession of pharmacist is defined.

Bolji ste od mene u toj struci s bombama u kovčezima.

You're much better at that occupation... with your bombs in suitcases.

Gdje je povrat ili kao što kažemo u struci, skok unatrag?

Where is the rebound, or as we say in the trade, the bounce-back?