Cut the radial at 30–45°, then track it inbound.
"Intercept the 090 radial inbound" means: fly onto the invisible line that leaves the station on 090° and follow it back TO the station on a heading of 270°. The radial (090) and the inbound course (270) are always 180° apart.
If the assigned radial is 090, set the OBS to 270 (radial + 180). The instrument is now expecting you on that course with a TO flag.
Turn to a heading that cuts the desired course by 30–45°. Bigger cut = faster intercept but bigger overshoot risk. 45° is a solid default when you're still far from the course.
The CDI stays pegged full-deflection until you're within ~10° of the course. As it starts moving toward center, reduce the cut — usually turning to parallel the course when the needle is one dot from center. Roll onto the inbound heading as it settles.
Hold the needle in the middle with 5° corrections and you're established. Report to ATC: "PDR, established 090 radial inbound."