Unwelcome invader to stay in hotel — try to intervene (8)
I believe the answer is:
visigoth
'unwelcome invader' is the definition.
'visigoth' can be an answer for 'invader' (I have seen 'European invader ' mean 'visigoth' so perhaps 'invader' could also mean 'visigoth'). I'm unsure of the 'unwelcome' bit.
'stay in hotel try to intervene' is the wordplay.
'stay in' becomes 'visit' (visit is a kind of stay. I am not sure about the 'in' bit.).
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'try' becomes 'go' (go is a kind of try).
'to intervene' means one lot of letters goes inside another (intervene can mean to enter into).
'visit'+'h'='visith'
'visith' placed around 'go' is 'VISIGOTH'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for visigoth that I've seen before include "Spanish settler" , "Early settler" , "Old European" , "One of those who sacked Rome in 410" , "he had a smashing time in Rome" .)