Fruit grew hot (7)

I believe the answer is:

rosehip

'fruit' is the definition.
(fruit of a rose plant)

'grew hot' is the wordplay.
'grew' becomes 'rose' (rise can mean to grow or increase).
'hot' becomes 'hip' (both can mean fashionable or trendy).
'rose'+'hip'='ROSEHIP'

(Other definitions for rosehip that I've seen before include "Wayside fruit" , "Fruit of the briar" , "Wild fruit for syrup" , "Fruit on wild plant" , "Fruit of the brier" .)

I've seen this clue in The Guardian and The Telegraph.

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