Fellow soldier turned up for fruit (3)
I believe the answer is:
fig
'fruit' is the definition.
(I've seen this before)
'fellow soldier turned up' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'soldier' becomes 'gi' (government issue or general issue**).
'turned up' says the letters should be written in reverse.
'gi' in reverse letter order is 'ig'.
'f'+'ig'='FIG'
'for' is the link.
(Other definitions for fig that I've seen before include "Fruit with many seeds" , "Sweet fleshy fruit, often dried" , "Fruit with lots of seeds" , "Kind of tree in effigy" , "This leaf may conceal nudity in art" .)