Plant one favoured beside college area (7)
I believe the answer is:
petunia
'plant one' is the definition.
'petunia' can be an answer for 'plant' (I've seen this before). I am not sure about the 'one' bit.
'favoured beside college area' is the wordplay.
'favoured' becomes 'pet' (as in a pet project).
'beside' says to put letters next to each other (I've seen this in other clues).
'college' becomes 'uni' (I've seen this in other clues**).
'area' becomes 'a' (maths abbreviation).
'pet'+'uni'+'a'='PETUNIA'
Can you help me to learn more?
(Other definitions for petunia that I've seen before include "Bloomer" , "Plant related to tobacco" , "Common garden plant" , "Flowering plant" , "Garden plant, originally from S. America" .)