Intrude clumsily being inexperienced (7)
I believe the answer is:
untried
'inexperienced' is the definition.
(similar in meaning)
'intrude clumsily' is the wordplay.
'clumsily' indicates an anagram.
'intrude' anagrammed gives 'UNTRIED'.
'being' is the link.
(Other definitions for untried that I've seen before include "inexperienced" , "Not yet experienced" , "Intrude, being not yet tested" , "escape court appearance thus" , "Intrude (anag.)" .)