Inexperienced and common? (5)
I believe the answer is:
green
This clue is a double definition.
'inexperienced' is the first definition.
(similar in meaning)
'common?' is the second definition.
(I know that common can be written as green)
'and' acts as a link.
(Other definitions for green that I've seen before include "bowlers here?" , "Environmentally sound" , "raw, as > part of course" , "member of political party" , "Concerned with the environment in colourful way" .)