See someone sit next to a girl (5)
I believe the answer is:
visit
'see someone' is the definition.
'visit' can be an answer for 'see' (synonyms). I'm not sure about the 'someone' bit.
'sit next to a girl' is the wordplay.
'next to' says to put letters next to each other.
'a girl' becomes 'Vi' (short for Violet).
'sit' after 'vi' is 'VISIT'.
Can you help me to learn more?
(Other definitions for visit that I've seen before include "pop by" , "Call upon" , "Inflict" , "Call on - stay" , "Go and see (someone)" .)