Cover soldier well with end of overall (7)
I believe the answer is:
parasol
'cover' is the definition.
(I've seen this before)
'soldier well with end of overall' is the wordplay.
'soldier' becomes 'para' (paratrooper).
'well' becomes 'so' (both can mean extremely).
'with' says to put letters next to each other.
'end of' says to take the final letters.
The last letter of 'overall' is 'l'.
'para'+'so'+'l'='PARASOL'
(Other definitions for parasol that I've seen before include "Small umberella for sun" , "sunblock" , ""Sunbrella"" , "Light umbrella giving shade from sun" , "Desert Shield?" .)