The most common and most likely answer to this crossword clue is the 8 letter word TACTICAL
I've seen this crossword clue in The Daily Telegraph
T
A
C
T
I
C
A
L
More clues leading to the result TACTICAL
Buddy explains!

The straight part
We know that "Strategic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strategic = tactical.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TACTICAL mean?
TACTICAL noun- A combinator of proof tactics.
- A private war reenactment event involving mock battles or skirmishes.
- Of, or relating to tactics
- Of, or relating to military operations that are smaller or more local than strategic ones
- Adroit, skilful or ingenious
- Having a military appearance, typically with accessories such as a bipod, adjustable stock, detachable magazine or black coloration